Reliable Japanese Toyota engines Series A. Reliable Japanese engines Toyota Series A pluses and cons

The first digit in the modern encoding of Toyotovsky engines shows the sequence number of the modification, i.e. first (basic) motor has labeling1 A., butthe first modification of this motor - 2A. , the following modification is called3A. And finally 4 A. (Under the "modification" means the release of a motor of another volume on the basis of an existing motor).

Family BUT originated in 1978 year, motor 1A. I had volume 1.5 L. (Piston diameter 77.5mm., Stroke 77.0mm), the main objectives of the creation were: compactness, low noise, ecological cleanliness, good torque characteristics and no maintenance need.

Various variations of engines 4A. Released S. 1982 by 2002 , in model row Toyota This engine took the place of "venerable old man" (with Hemi head by the way)and he himself later changed much less successful . All brightness of engineering thought over the past 40 years I reflected in the table:

	2t- C.	4A. -C.	3zz-Fe.
Volume	1588 cm3	1587 CM3.	1598 cm3
Cylinder diameter \\ Piston stroke	85mm \\ 70mm.	81mm \\ 77mm.	79mm \\ 85.1mm
Compression ratio	8.5:1	9.0:1	10:1
Max. Power (about. / minutes) Max. Moment (about. / minutes)	88 hp (6000) 91 N * M (3800)	90 hp (4800) 115 (2800)	109 hp (6000) 150 (3800)
Camshaft \\ hydrocompensators	OHV \\ No	SOHC \\ No	Dohc \\ no
GRM drive	Chain	Belt	Chain
Estimated service life	450 tkm.	300 t.km.	210 bend
Years of release (total family)	1970-1985	1982 -2002	2000 - 2006

As you can see, engineers are able to raise the degree of compression, reduce durability and gradually made from the short-terrestrial engine more "compact" long engine ...

I was with me Personally in operation and repair (carburetor with 8 valves and with 17 tubes to the carburetor and different pneumoclips that can not buy anywhere) I can't say anything good - the guide valves broke in the head, you can't buy it separately, it means that it is a replacement Heads (only where to find the 8th valve head?). The crankshaft is better to change, than to sharpen - I have passed only 30 thousand after boring until the first repair size. The oil truck is not at all successful (the grid is closed by a casing, in which one hole from the bottom, sizes with a penny coin) - beat some nonsense because of what the engine pounded ...

Maslonasos is made even more interesting: the design is almost 3 parts and valve, mounted in the front cover of the engine, which dresses to the crankshaft (by the way, the front crankshaft gland is difficult to change). Actually, the front end of the olon pump crankshaft and operates. I specifically looked at Toyotovsky engines of those years R.,T. and K. well or the following series S. and G. - Nowhere is such a solution (the oil pump drive the front end of the crankshaft directly or through the gear transmission) has never been applied! I still remember the Russian book on the design of engines, which said, why it is impossible to do (I hope, smart know, and I will only tell the fools for the money).

Okay, let's deal with the labeling engine: letter FROM After a dash, I mean the availability of an emission control system ( C. Not used if the engine was originally equipped to control emissions, connected C. With California, then only there were strict emission standards),

Letter E. After a dash, I mean the distributed fuel injection (ELECTRONIC FUEL INJECTION - EFI), imagine the injector on the 8-migneal Toyotovsky engine! I hope you will never see this! (Put on the AE82, if anyone is interested).

/. Letter L. after a dash meant that the engine is installed on the car across, and the letter U. (from Unleaded Fuel) that the emission control system is calculated for gasoline available in those years only in Japan.

Fortunately, 8 valve engines of the series and you will no longer find, so let's talk about 16 and 20 valve engines. Them a distinctive feature is the presence in the name of the engine after dash letters F. (The engine of a standard power row with four valves per cylinder, or how to make marketers - High Efficiency Twincam Engine), only one distribution shaft has a drive from such engines, the second is driven from the first through the gear (engines with so called a narrow head of the cylinder block), for example, 4a-f. Or letters G. - This is the engine, each of the camshafts of which has its own drive from the belt (chain) timing. Toyota marketers call these engines High Performance Engine, and they are driven through their own gears (with a wide head of the cylinder block).

Letter T. Meaning the existence of turbocharging (turbocharged), and the letter Z (supercharged) is a mechanical supercharger (compressor).

- good choice for purchase, only if it is not equipped with a systemLEAN BURN:

When breaking the belt valves in the engine bend!
The 4a-Fe LEAN BURN (LB) engine differs from the usual 4a-Fe design of the cylinder head, where in four of the eight intake channels there is a protrusion for the formation of twist at the inlet in the cylinder. Fuel injectors Installed directly into the head of the cylinder block and injected fuel to the inlet valve area. Injection is carried out alternately by each nozzle (by sequential scheme).
On most LB engines of the second half of the 90s, the ignition system of the DIS-2 type (Direct Ignition System) is used, with 2 ignition coils and special candles with platinum spraying electrodes.
In the LB scheme of European models applied new Type Oxygen sensors (LEAN Mixture Sensor), which are significantly more expensive compared to usual, and at the same time not having low-cost analogs. In the scheme for japanese market An ordinary lambda probe is applied.
Between the intake manifold and the head of the cylinder block installed a system of dampers with pneumatic control.
Valve valve are driven by a vacuum supplied to a shared pneumatic actuator using an electropneumoclap by signal. electronic block control (ECU) depending on the degree of opening throttle valve and rotational speed.

As a result, the differences between 4a-Fe LB from 4a-Fe simple:

1. The ignition coil is deposited from the site (ignition distributor) on the wall of the engine compartment.
2. There is no detonation sensor.
3. The nozzles are located not on the intake manifold, but on the head and injected the fuel mixture almost immediately in front of the intake valve.
4. At the junction intake manifold And the block heads are additional controlled dampers.
5. Nozzles work alternately all four, and not in pairs.
6. Candles should be only platinum.

- installed only on some modifications Carina E-AT171, Sprinter Carib E-AE95G, Sprinter Carib E-AE95G<4WD> - Motors are full on disassembly, it is better to immediately take a contract, and do not try to repair the old one!

Number of cylinders, layout, timing type, valve number: R4; DOHC, 16 Valve;
Engine volume, cm3 (displacement (CC)): 1587;
Engine power, hp / revolutions-min: 115/6000;
Torque, n-m / ob. Min: 101/4400;
Compression ratio (Compression Ratio): 9.50;
Diameter (Bore) / Piston stroke (STROKE), mm: 81.0 / 77.0

The originals are not easy ways to like the compressor version of this engine, it was put on:

Corolla Levin -ceres E-AE101, Corolla Levin -ceres E-AE92, MR-2 E-AW11, MR-2 E-AW11, Sprinter Trueno-Marino E-AE101, Sprinter Trueno-Marino E-AE92

Engine model: 4a-Gze,
Number of cylinders, layout, timing type, valve number: R4; DOHC, 16 Valve;
Engine volume, cm3: 1587;
Engine power, hp / revolutions-min: 145/6400;
Torque, n-m / ob. Min: 140/4000;
Compression ratio: 8.00;
Diameter / Piston stroke, mm: 81.0 / 77.0

Engine will easily find on disassembly, the only problem: MR2 has its own engine, not interchangeable with the rest.

All right, you can talk about these engines for a long time, but you need some outcome: I am glad that I managed to get acquainted with the design of this engine, he overtook a lot of my time, and its design is largely better than the later Toyotov engine, although even it has time A little spoil the ecological theme and the design of the oil pump and the oil worker, I do not consider successful. But, after all, the engineers were not required to create an engine that will survive the body ... I would not recommend buying Toyota with this engine, simply, because the car as a whole will be a garbage (although Audi, Mercedes and even Mazda for the same years Perhaps still beware will ride) - nothing can be done, apparently, the real slogan of Toyota - "I don't need more, the main thing, the fence should be even!"

Well, the last, full story of the series A:

Engines for Toyota manufactured in the series and the most common and are quite reliable and popular. In this series of engines, a worthy place occupies a motor 4A. in all its modifications. At the beginning engine He had low power. Manufactured with a carburetor and one switchgearThe engine head had eight valves.

In the process of modernization, it was prepared first with a 16th valve head, then with a 20-type valve and two distributive treals and with electronic fuel injection. In addition, the engine borrowed another piston. Some modifications were collected with a mechanical supercharger. Consider a Read more Motor 4A with its modifications, identify it weak spots and disadvantages.
Modifications engine 4 A.:

• 4A-C;
• 4A-L;
• 4A-LC;
• 4A-E;
• 4A-ELU;
• 4a-F;
• 4a-Fe;
• 4a-Fe Gen 1;
• 4a-Fe Gen 2;
• 4a-Fe Gen 3;
• 4A-FHE;
• 4A-GE;
• 4A-GE Gen 1 "Big Port";
• 4A-GE Gen 2;
• 4A-GE GEN 3 "Red Top" / Small Port ";
• 4A-GE Gen 4 20V "Silver Top";
• 4A-GE Gen 5 20V "Black Top";
• 4a-Gze;
• 4a-Gze Gen 1;
• 4a-Gze Gen 2.

Motor 4A and its modifications made cars Toyota:

• Corolla;
• Koronna;
• Karina;
• Karina E;
• Selik;
• Avensis;
• Calin;
• AE86;
• Ceres;
• Levin;
• Save;
• Sprinter;
• Sprinter Carib;
• Marino Sprinter;
• Trino Sprinter;

In addition to Toyota, the engines were installed on cars:

• Chevrolet Nova;
• Geo Prism.

Weak Engine Places 4A

• The Lambda probe;
• Absolute pressure sensor;
• Engine temperature sensor;
• Crankshaft glands.

Weak spots More engine detail ...

The failure of the Lamd probe or differently - an oxygen sensor is not often occurring, but in practice it occurs. Ideally, for the new engine, the resource of the oxygen sensor is small 40-80 thousand km, if the engine has a problem with piston and fuel consumption and oil, then the resource is significantly reduced.

Sensor absolute pressure

As a rule, the sensor sums up due to the poor connection of the inlet reservoir.

Engine temperature sensor

Calculates not often, as they say rarely but aptly.

Selns of the crankshaft

The problem with the oscilts of the crankshaft is associated with the passage of the engine and the time passed from the moment of manufacture. Manifests itself simply or squeezing oil. Even if the car has a small mileage, then the rubber of which the glands made after 10 years loses its physical qualities.

Disadvantages of Engine 4a.

• Increased fuel consumption;
• Swipe engine speeds or elevated.
• The engine does not start, stalls with rolver swimming;
• Stall motor;
• Increased oil consumption;
• Knocks the engine.

disadvantages Motor 4A Details ...

Increased fuel consumption

The cause of increased fuel consumption can be:

1. malfunction of lambda probe. The disadvantage eliminate it with replacement. In addition, if on the candlelight of the soot, and from the exhaust black smoke and the engine vibrates on idling - Check the absolute pressure sensor.
2. Dirty nozzles, if so, then they need to rinse and purge.

Floating the speed of idling engine or elevated

The reason for the malfunction of the idling and tart valve on the throttle, or the throttle position sensor setting failure is failed. Just in case, clean the throttle, rinse the idling valve, check the candles - the presence of Nagar also contributes to the problem with the engine speed at idle. It will not be superfluous to check the nozzles, and the valve of ventilation valve crankcase gases.

The engine does not start, stalls with swimming speed

This problem speaks of a malfunction temperature sensor Engine.

Motor stalls

In this case, this may occur due to the scored fuel filter. In addition to find the cause of the fault, check the operation of the fuel pump and the status of the traver.

Increased oil consumption

Plant Manufacturer admits normal flow Oils up to 1 liter per 1000 km, if it is more - it means a problem with piston. As an option can help replace piston rings and oil-changing caps.

Sticks the engine

The sound of the engine is the drive signal of the piston fingers and the scratoring of the valve splitting valves in the engine head. In accordance with the instruction manual, the valve is regulated after 100,000 km.

As a rule, all flaws and weak points are not a production or constructive marriage, but are a consequence of non-compliance with the correct operation. After all, if it is not for timely technique, she will eventually ask for it. You must understand that mostly all breakdowns and problems begin after developing a certain resource (300,000 km), it is the first cause of all faults and disadvantages in motor 4a.

Very expensive will be a car with engine versions of LEAN BURN, they work on a depleted mixture and from which their power is significantly lower, they are more capricious, and expensive expensive.

All weak points and disadvantages described are also relevant for engines 5a and 7a.

P.S. Dear owners of Toyota with engine 4a and its modifications! You can complement your comments this article, for which I will be grateful to you.

"A" (R4, belt)
Engines a series A in prevalence and reliability divide, perhaps, the championship with Series S. As for the mechanical part, it is generally difficult to find more competently designed motors. At the same time, they have good maintainability and do not create problems with spare parts.
Installed on Cars "C" and "D" (COROLLA / SPRINTER, CORONA / CARINA / CALDINA).

4A-Fe. - the most common engine series, without significant changes
released since 1988, has no pronounced constructive defects
5A-FE. - An option with a reduced working volume, which is still produced in Chinese Toyota plants for internal needs
7A-Fe. - Fresh modification with increased volume

In the optimal serial version 4a-Fe and 7a-Fe went to the Corolla family. However, being installed on Corona / Carina / Caldina line cars, they over time received the LEANBURN type nutrition system designed to combustion of depleted mixtures and helps save japanese fuel with a calm ride and traffic jams (more about constructive features - cm. in this material which model installed LB - ). It should be noted that the Japanese is pretty "podriad" to our ordinary consumer, many owners of these engines face
the so-called "problem of LB", which is manifested in the form of characteristic failures on medium turnover, the reason for which it is possible to establish and heal is not possible - is the low quality of local gasoline, or the problems in power and ignition systems (to the state of the candles and high voltage wires These engines are particularly sensitive), or all together - but sometimes the depleted mixture is simply not ignited.

Small additional minuses are a tendency to increased wear of camshaft beds and formal difficulties with adjusting the gaps in the inlet valves, although in general work with these engines is convenient.

"The engine 7a-Fe Leanburn is low-speed, and it is even a 3s-FE travelet due to the maximum of the moment at 2800 revolutions"

Outstanding traction low revolutions Motor 7A-Fe is in Leanburn version - one of the common misconceptions. All civilian engines of the A series A "dugorbay" curve of torque - with first peak of N2500-3000 and the second to 4500-4800 rpm. The height of these peaks is almost the same (the difference is applied hardly in 5 nm), but the std engines are fine above the second peak, and LB is the first. Moreover, the absolute maximum of the moment in STD still turns out to be more (157 against 155). Now compare with 3S-Fe. The maximum moments of 7a-Fe LB and 3S-FE type "96 are 155/2800 and 186/4400 nm, respectively. But if you take the characteristic as a whole, then 3S-Fe with the same 2800 comes out at the time of 168-170 nm, and 155 nm - It gives up 1600-1900 revolutions around 1700-1900.

4A-GE 20V - Forced monster for small GT replaced in 1991 by the previous base engine of the entire series A (4a-GE 16V). To provide power in 160 hp, the Japanese used a block head with 5 valves per cylinder, system vvt. (For the first time, applying the variable phases of gas distribution on Toyota), Redline Tachometer for 8 thousand. Minus - such an engine will be inevitably stronger than "Ushatan" compared to the average server 4A-FE of the same year, since it was not originally bought in Japan for an economical and gentle ride. More serious requirements for gasoline (high degree of compression) and to oils (VVT drive), so it is intended primarily to someone who knows and understands its features.

With the exception of 4a-GE, the engines are successfully powered by gasoline with octane number 92 (including LB, for which the requirements are even softer). Ignition system - with a distributor ("TRABLARNY") for serial options and DIS-2 in late LB (Direct Ignition System, on one ignition coil for each pair of cylinders).

Engine	5A-FE.	4A-Fe.	4a-Fe LB	7A-Fe.	7A-Fe LB	4A-GE 20V
V (see 3)	1498	1587	1587	1762	1762	1587
N (hp / at rpm)	102/5600	110/6000	105/5600	118/5400	110/5800	165/7800
M (nm / at rpm)	143/4400	145/4800	139/4400	157/4400	150/2800	162/5600
Compression ratio	9,8	9,5	9,5	9,5	9,5	11,0
Gasoline (recommended)	92	92	92	92	92	95
Ignition system	trambl.	trambl.	DIS-2	trambl.	DIS-2	trambl.
Nut valve	not	not	not	not	not	yes**

In terms of reliability, popularity and prevalence, the A-series motors are not inferior to power drives Toyota S-series. The 4a FE engine was created under C and D Class cars, that is, numerous modifications and restyled versions of Carina, Corona, Caldina, Corolla and Sprinter. Initially, the engine does not have complex nodes, can be repaired and serviced by the owner in the garage without visiting a hundred.

In the basic version, the manufacturer laid 115 liters. p., But for some markets, an artificial understatement of capacity up to 100 liters is recommended. from. for decreasing transport tax and insurance premiums.

Specifications 4A Fe 1.6 l / 110 liters. from.

Marking in Engine toyota manufacturer Fully informative, although a little encrypted. For example, the presence of 4 cylinders does not indicate a figure, but the Latin F, the first letter A denotes a series of motor. Thus, 4a-Fe is deciphered as follows:

• 4 - in its series, the motor is developed by the fourth on account;
• A - one letter points out that he began to go from the factory until 1990;
• F - the engine circuit is four-glove, drive to one camshaft, transmission of rotation from it the second camshaft, no forcing;
• E - multipoint injection.

In other words, the feature of these engines is the "narrow" GBC and the DOHC gas distribution scheme. Since 1990, the power drives has been modernized to transfer them to gasoline with a low-fusion number. To do this, the LEANBURN nutrition system was used to delete the fuel mixture.

To familiarize yourself with the capabilities of the 4a Fe motor specifications Committed to the table:

Manufacturer	Tranjin Faw Engines Plant №1, North Plant, Deeside Engine Plant, Shimoyama Plant, Kamigo Plant
Mark DVS	4A FE.
Years of production	1982 – 2002
Volume	1587 cm3 (1.6 l)
Power	82 kW (110 l. P.)
Torque moment	145 nm (4,400 rpm)
Weight	154 kg
Compression ratio	9,5 – 10,0
Food	injector
Motor Type	in line gasoline
Ignition	mechanical, traver
Number of cylinders	4
The location of the first cylinder	Twue
Number of valves on each cylinder	4
Material GBC	aluminum alloy
Intake manifold	durally
Exhaust manifold	steel weld
Camshaft	phases 224/224
Cylinder block material	cast iron
Diameter of the cylinder	81 mm
Pistons	3 repair sizes, original with cekesk for valves
Crankshaft	cast iron
Piston move	77 mm
Fuel	AI-92/95
Ecology standards	Euro-4.
Fuel consumption	route - 7.9 l / 100 km mixed cycle 9 l / 100 km city - 10.5 l / 100 km
Oil consumption	0.6 - 1 l / 1000 km
What oil pour into a viscosity engine	5W30, 15W40, 10W30, 20W50
Which oil is better for the engine by manufacturer	BP-5000.
Oil for 4a-Fe in composition	Synthetic, semi-synthetic, mineral
Motor oil volume	3 - 3.3 l depending on the car
Working temperature	95 °
RF resource	announced 300,000 km real 350000 km
Adjustment of valves	nuts, washers
Cooling system	forced, antifreeze
Volume of oh	5.4 L.
water pump	GMB GWT-78A 16110-15070, AISIN WPT-018
Candles on RD28T.	BCPR5EY NGK, CHAMPION RC12YC, BOSCH FR8DC
Candle clearance	0.85 mm
Timing belt	Belt Timing 13568-19046.
The order of the cylinders	1-3-4-2
Air filter	MANN C311011.
Oil filter	VIC-110, MANN W683
Flywheel	6 bolt mount
Fastening bolts flywheel	M12x1.25 mm, Length 26 mm
Valve stem seals	Toyota 90913-02090 intake Toyota 90913-02088 prom
Compression	from 13 bar, difference in adjacent cylinders maximum 1 bar
Turnover XX	750 - 800 min-1
Thinking force threaded connections	candle - 25 nm flywheel - 83 nm clutch bolt - 30 nm bearing cover - 57 nm (indigenous) and 39 nm (connecting rod) cylinder head - three stages 29 nm, 49 nm + 90 °

The Toyota manufacturer's manual recommends replacing oil after 15,000 km. In practice, this is done twice as much or, at least, after passing the 10000 mileage.

Design features

In its series, the 4a FE engine has average characteristics and has the following constructive features:

• an inline layout of 4 cylinders, boring directly in the body of the cast-iron block without sleeves;
• the two upper camshafts according to the DOHC scheme to control gas distribution through 16 valves inside the aluminum cylinder head;
• drive with a belt of one camshaft, transmitting rotation from it to the second camshaft with a gear wheel;
• the distribution of ignition from one coil with the exception of later versions of the LB, in which there was its coil for each pair of cylinders according to the DIS-2 scheme;
• variations of motors for low-fuel LB fuel have a smaller power and torque - 105 liters. from. and 139 nm, respectively.

The valves of the motor does not oppress, like the whole series A, so the overhaul during the sudden cloth of the timing belt does not have to do.

The list of modifications of the DVS

There were three versions of 4a Fe power actuator with the following constructive features:

• Gen 1 - was produced in the period 1987-1993, possessed with a capacity of 100-102 liters. s., had electronic injection;
• Gen 2 - he was entrusted in 1993 - 1998, had a power of 100-10 liters. C, the injection of the injection, the SPG, the intake manifold has changed, the head of the cylinder block is upgraded under the new camshafts, the fins of the valve cover added;
• Gen 3 years of release 1997 - 2001, power increased to 115 liters. from. Due to the change in the geometry of the intake and exhaust manifold, the OBS was used only for the domestic market machines.

Replaced the company's management of the Motor 4A FE with a new 3ZZ Fe powerover family.

Pros and cons

The main advantage of the 4a Fe design is the fact that the piston does not oppress the valve at the time of the pulp cliff. The rest of the advantages are:

• the presence of spare parts;
• low operational budget;
• high resource;
• the possibility of independent repair / maintenance, since hinged equipment does not prevent this;

The main disadvantage is the LEANBURN system - in the domestic market of Japan, such machines are considered very economical, especially in traffic jams. For the gasoline of the Russian Federation, they are practically not suitable, since the power failure is observed in the average turnover, which cannot be heal. Motors become sensitive to the quality of fuel and oil, the state of high-voltage wires, tips and candles.

Because of the non-paying fit of the piston finger and the increased wear of the camshaft beds, the overhaul happens more often, but it can be done with its own hands. The manufacturer uses highly resource hinged equipment, the power drive has three modifications in which the volume of combustion chambers are preserved.

List of car models in which installed

Initially, the 4a FE engine was created exclusively for cars japanese manufacturer Toyota:

• Carina - V generation in the body T170 Sedan 1988 - 1990 and 1990 - 1992 (restyling), VI generation in the body T190 Sedan 1992 - 1994 and 1994 - 1996 (restyling);
• Celica - V generation in the body T180 coupe 1989 - 1991 and 1991 - 1993 (restyling);
• Corolla (European market) - VI generation in the body E90 hatchback and wagon 1987 - 1992, VII generation in the body of the E100 hatchback, sedan and wagon 1991 - 1997, VIII generation in the body of the E110 Universal, Hatchback and Sedan 1997 - 2001;
• Corolla (the domestic market of Japan) - 6, 7 and 8 generation in the E90 bodies, E100 and E110 sedan / universal 1989 - 2001, respectively;
• Corolla (American market) - 6 and 7 generation in E90 and E100 Body Universal, coupe and sedan 1988 - 1997, respectively;
• Corolla Ceres - I generation in the body of the E100 Sedan 1992 - 1994 and 1994 - 1999 (restyling);
• Corolla FX - III generation in the Body E10 hatchback;
• Corolla Levin - 6 and 7 generation in E100 and E100 coupe coupes 1991 - 2000;
• Corolla Spacio - I generation in the body E110 Minivan 1997 - 1999 and 1999 - 2001 (restyling);
• CORONA - IX and X generation in body T170 and T190 sedan 1987-1992 and 1992 - 1996, respectively;
• Sprinter Trueno - 6 and 7 generation in E100 and E110 bodies coupe 1991 - 1995 and 1995 - 2000, respectively;
• Sprinter Marino - I generation in the body E100 Sedan 1992 - 1994 and 1994 - 1997 (restyling);
• SPRINTER CARIB - II and III generation in E90 and E110 bodies Universal 1988 - 1990 and 1995 - 2002, respectively;
• SPRINTER - 6, 7 and 8 generations in Kuzov AE91, U100 and E110 Sedan 1989 - 1991, 1991 - 1995 and 1995 - 2000, respectively;
• Premio - I generation in the body T210 Sedan 1996 - 1997 and 1997 - 2001 (restyling).

This motor was stood in Toyota Ae86, Caldina, Avensis and MR2, the engine characteristics allowed them to equip GEO Prizm cars, Chevrolet Nova and Elfin Type 3 Clubman.

Rules of maintenance 4a Fe 1.6 l / 110 l. from.

In line gas engine 4A FE must be serviced on the following dates:

• resource motor oil is 10,000 km, then the replacement of lubricant and filter is necessary;
• the fuel filter is to be replaced after 40,000 mileage, air twice as often;
• the battery life is set by the manufacturer, the average is 50 - 70 thousand km;
• candles should be changed after 30000 km, and check annually;
• the ventilation of the crankcase and the adjustment of the thermal gaps of the valves is produced at the turn of 30000 mileage of the car;
• the replacement of antifreeze occurs after 50,000 km, inspect the hoses and the radiator must be constantly;
• the exhaust manifold can fire through 100,000 km of run.

Initially, a simple DVS device allows you to repair own forces in the garage.

Overview of faults and ways to repair

By virtue of structural features, the 4a FE motor is subject to the following "diseases":

A knock inside the DVS	1) with a large mileage of piston fingers 2) with a slight impaired thermal gaps of valves	1) replacement of fingers 2) adjustment of gaps
Improving the flow of oil	developing masonry Caps or rings	diagnostics and replacement of consumables
Motor starts and stalls	fault fuel system	cleaning nozzles, traver, fuel pump, fuel filter replacement
Floating revs	ventilation of the ventilation of the crankcase, throttle, nozzles, Wear RXX	cleaning and replacing candles, nozzles, idle regulator
Increased vibration	zado nozzles or candles	replacing nozzles, candles

Spaces with electric hoists and starting the engine after developing the resource of sensors or their breakdowns. Because of the burned lambda probe, fuel consumption can increase and form a nagar to candlelight. On some toyota cars Moves were installed with the LEAN BURN system. Owners can pour gasoline with a low octane number, but the interremmer period is reduced by 30 - 50%.

Motor tuning options

Inside its Toyota power actuator series, the 4a FE engine is considered unsuitable for modernization. Usually tuning is performed for versions of 4a GE, in which, by the way, there is a turbocharged up to 240 liters. from. Analogue Even when installing Turbo Whale on 4a Fe, it will be maximum 140 liters. s., which is incommensurable with initial investments.

However, an atmospheric tuning is possible in the following way:

• reducing the degree of compression due to the replacement of the crankshaft and the SPG;
• grinding of the GBC, an increase in the diameter of the valves and the saddle;
• use of high-performance nozzles and pump;
• replacing camshafts on products with a larger valve opening phase.

In this case, tuning will provide the same 140 - 160 liters. p., But without reducing the operational resource of the engine.

Thus, the 4a FE motor does not oppress the valves, has a high resource from 250000 km of mileage and a base power of 110 liters. with., which is artificially underestimated on the conveyor for some car models.

If you have any questions - leave them in the comments under the article. We or our visitors will gladly respond to them

Toyotovsky power units of the series "A" were one of the best developments that companies allowed to get out of the crisis in the 90s of the last century. The largest volume was Motor 7A.

One should not be confused 7a and engine 7K. No related relationship these power aggregates do not have. DVS 7K was produced from 1983 to 1998 and had 8 valves. Historically, the "K" series began its existence in 1966, and the series "A" in the 70s. Unlike 7K, the engine series A developed as a separate direction of development 16 valve motors.

Engine 7 A has become a continuation of the improvement of 1600 cubic motor 4a-Fe and its modifications. The volume of the engine grew up to 1800 cm3, the power and torque increased, which reached 110 hp. and 156nm, respectively. The 7A FE engine was produced at the main production of Toyota Corporation from 1993 to 2002. The power units of the series "A" are still produced in some enterprises using licensed contracts.

Constructive force aggregate Made according to the rancing fourth of the fourth four, respectively, the camshafts control the operation of 16 valves, respectively, the camshafts. The fuel system is made injector with electronically controlled and rubbed ignition distribution. Driver timber belt. When the valve belt is cut, it is not bent. The head of the block is made in the same way as the head of the 4A series engine block.

Official options for the improvement and development of the power unit are not. Supplied with a single number-letter 7A-FE index for configuration different cars Up until 2002. The successor of the 1800 cubic drive appeared in 1998 and had 1zz index.

Constructive modifications

The engine received a block with an increased vertical size, the changed crankshaft, the head of the cylinders, increased the course of the pistons while maintaining the diameter.

The uniqueness of the design of the engine 7a is to use a two-layer metal laying of the block head and a two-circuit crankcase. The upper part of the crankcase, which was performed from the aluminum alloy, was attached to the block and the gearbox body.

The lower part of the crankcase was made of steel sheet, and allowed it to dismantle it, without removing the engine. Motor 7A has improved pistons. In the groove of the oil surcharge ring, 8 holes for draining oil in the crankcase are made.

The upper part of the fastener cylinder block is made in the same way. 4a-Fe is allowed to use the head of the cylinder block from a smaller motor. On the other hand, the blocks of the blocks are not entirely identical, since the diameters of the intake valves with 30.0 were changed on the 7 A series, and the diameter of the outlet valves is left unchanged.

In this case, other camshafts provide greater opening of intake and exhaust valves of 7.6 mm versus 6.6 mm per 1600 cubic engine.

Changes were made to the design of the exhaust manifold to attach WU-TWC converter.

Since 1993, the fuel injection system has changed on the engine. Instead of simultaneous injection into all cylinders, a pairwise injection began to apply. Changes were made to the settings of the gas distribution mechanism. Changed the opening phase of the outlet valves and the closing phase of intake and exhaust valves. What made it possible to increase power and reduce fuel consumption.

Until 1993, the engine starting system was used on the engines, which was used on the 4a series, but then, after finalizing the cooling system, refused to be refused. The engine control unit is left as the same, with the exception of two additional options: the ability to test the system operation and control over the detonation, which were added to the ECM for an 1800 cubic engine.

Specifications and reliability

7a-Fe characteristics have met different. Motor had 4 versions. As a basic configuration, a motor capacity of 115 hp was produced. and 149 nm torque. The most powerful version of the DVS was produced for Russian and Indonesian markets.

She had 120 hp and 157 nm. For the American market, the "clamped" version was also produced, which was given only 110 hp, but with an increased to 156 nm torque. The weakest version of the engine squeezed 105 hp, as well as the 1.6 liter motor.

Part of the engines has the designation 7a Fe Lean Burn or 7a-Fe LB. This means that the engine is equipped with a depleted mixture combustion system, which first appeared on Toyota engines in 1984 and hidden under the T-LCS abbreviation.

Linben technology allowed to reduce fuel consumption by 3-4% when driving around the city and just over 10% when driving on the highway. But this, the system reduced the maximum power and torque, therefore evaluating the effectiveness of the use of this constructive refinement.

Engines equipped with LB, mounted on Toyota Karina, Caldina, Corona and Avensis. Corolla cars have never been completed with engines with such a fuel economy system.

In general, the force aggregate is quite reliable and not soared in operation. Resource to first overhaul Superior 300,000 km run. During operation, attention must be paid electronic devicesserving engines.

The overall picture spoils the Linburn system, which is very arrogant to the quality of gasoline and has an increased cost of operation - for example, requires an ignition candle with platinum inserts.

Major faults

The main malfunctions of the engine operation are associated with the functioning of the ignition system. The splitting system of the spark is implied by wear of the bearings of the traver and gear gear. As wear is accumulated, it is possible to shift the moment of the spark that entails or to the ignition pass or to the loss of power.

Very demanding to clean high voltage wires. The presence of contaminants causes a sample of sparks on the outer part of the wire, which also leads to engine troop. Another cause of trimming is the wear or pollution of the spark plugs.

Moreover, the system is affected by the system and the NAGA, which is formed when using waterproof or iron-sulfur fuel, and the external contamination of the surfaces of the candles, which leads to a breakdown on the cylinder head housing.

The fault is eliminated by replacing candles and high-voltage wires included.

As a malfunction, engines equipped with the LEANBURN system are often recorded, in the 3000 rpm area. The fault occurs because there is no spark in one of the cylinders. Caused by usually wear platinum.

With a new high-voltage set, it may be necessary to clean the fuel system to eliminate contaminants and restore the injectors. If it does not help, then the malfunction can be found in the Esud block, which may require flashing or replacement.

The engine knock is due to the operation of the valves requiring periodic adjustment. (No less often 90,000 km). The piston fingers in the engines 7a are pressed, so the additional knock on this engine element is extremely rarely fixed.

Elevated oil consumption is laid constructively. The technical passport of the engine 7A FE indicates the possibility of natural flow to operate to 1 l of engine oil per 1000 km of mileage.

That and technical fluids

As recommended fuel, the manufacturer's plant indicates gasoline with an octane number of not lower than 92. The technological difference should be taken into account in determining the octane number of Japanese standards and the requirements of the GOST. It is possible to use non-determined 95 fuel.

Motor oil is selected by viscosity in accordance with the operating mode of the car and the climatic features of the region of operation. Most fully overlaps all possible conditions synthetic oil SAE 5W50 viscosity, however, for everyday average exploitation, there is enough viscosity oil 5W30 or 5W40.

For a more accurate definition, refer to the instruction manual. Capacity of the oil system is 3.7 liters. When replacing a filter change on the walls of the internal channels of the engine, up to 300 ml of lubricant can remain.

Engine maintenance is recommended to produce every 10,000 km of run. In case of severe operation, or using a car in highland, as well as at more than 50 engine launches at temperatures below -15С, it is recommended to reduce the service period by half.

The air filter changes as of state, but at least 30,000 km of mileage. The timing belt requires replacement regardless of its state every 90,000 km of run.

NB. When passing, it may require a reconciliation of a series of engine. The engine number must be located on a platform located in the rear of the engine under the outlet at the generator level. Access to this area is possible with a mirror.

Tuning and engine refinement 7A

The fact that the internal combustion engine was originally designed based on the 4a series, allows you to use a block of a block from a smaller engine and modify the 7A-FE motor up to 7a-GE. Such a replacement will give an increase of 20 horses. When performing such a finalization, it is also desirable to replace the original oil pump on the unit from 4A-GE, which has greater performance.

Turbization of the 7A series engines is allowed, but leads to a decrease in the resource. Special crankshafts and inserts for chance are not produced.