Engine Toyota 4A

For the first time Toyota 4A was released in 1982 and did not leave the assembly line until 2002. The first two characters in its name indicate that this is the fourth modification in the “A” series of engines produced by the company. The series began ten years earlier, when the company’s engineers set out to create a new engine for Toyota Tercel, which would provide more economical fuel consumption and better technical performance.

Specifications

Manufacturer Kamigo Plant
Shimoyama Plant
Deeside Engine Plant
North Plant
Tianjin FAW Toyota Engine’s Plant No. 1
Also called Toyota 4A
Production years 1982-2002
Cylinder block alloy cast iron
Fuel system carburetor/injector
Configuration inline
Number of cylinders 4
Valves per cylinder 4/2/5
Piston stroke, mm 77
Cylinder bore, mm 81
Compression ratio 8
8.9
9
9.3
9.4
9.5
10.3
10.5
11
Displacement, cc 1587
Power output, hp 78/5600
84/5600
90/4800
95/6000
100/5600
105/6000
110/6000
112/6600
115/5800
125/7200
128/7200
145/6400
160/7400
165/7600
170/6400
Torque output, Nm / rpm 117/2800
130/3600
130/3600
135/3600
136/3600
142/3200
142/4800
131/4800
145/4800
149/4800
149/4800
190/4400
162/5200
162/5600
206/4400
Fuel type 92-95
Euro standards
Weight, kg 154
Fuel consumption, L/100 km (for Celica GT)
— city
— highway
— combined
10.5
7.9
9.0
Oil consumption, gr/1000 km up to 1000
Recommended engine oil 5W-30 / 10W-30 / 15W-40 / 20W-50
Engine oil capacity, liter 3.9
Oil change interval, km 10000
(better 5000)
Normal engine operating temperature, °C
Engine lifespan, km
— official information
— real
300
300+

Frequent problems

  1. Excessive fuel consumption. The reason is the lambda probe. Replacement required. It is also necessary to diagnose the absolute pressure sensor if there are vibrations in idle, dark smoke and plaque on the candles.
  2. Burnout fuel plus vibration – need to clean injectors.
  3. Interruptions in turnover or freezing. Idle valve defective. You also need to clean the throttle valve and adjust its position sensor.
  4. No motor start and floating speed. The thermal sensor is out of order.
  5. Interruptions in speed. It is necessary to clean the throttle valve, KXX, injectors, crankcase valve and spark plugs.
  6. The engine often goes out. The reason is a gasoline pump, distributor or fuel filter.
  7. Oil burn. Replace rings and valve stem seals.
  8. Knocking on the motor. It is usually produced by piston pins. If the mileage is high, the valve clearances need to be adjusted.

On average, unit 4A (as well as 5A and 7A based on it) is designed for at least 300 thousand km of track. Lean Burn versions are not recommended for purchase, as they do not differ in good performance.

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