Engine Toyota 1GR under the hood

Engine Toyota 1GR

Toyota GR series engines are V6 gasoline engines manufactured by Toyota. The GR series engines consist of a die-cast aluminum engine block with an aluminum cylinder head with two camshafts. Structurally, the angle between the pistons is 60 degrees. Injection engine with 4 valves per cylinder, forged connecting rods, one-piece cast camshaft and cast aluminum intake manifold. The GR series engines replaced engines such as the MZ V6 and JZ inline 6, as well as the V6 VZ used on light trucks.


Manufacturer Kamigo Plant
Shimoyama Plant
Tahara Plant
Toyota Motor Manufacturing Alabama
Also called 1GR
Production years 2002
Cylinder block alloy aluminum
Fuel system injector
Configuration V
Number of cylinders 6
Valves per cylinder 4
Piston stroke, mm 95
Cylinder bore, mm 94
Compression ratio 10
Displacement, cc 3956
Power output, hp 236/5200
Torque output, Nm / rpm 361/4000
Fuel type 95
Euro standards Euro 5
Weight, kg 166
Fuel consumption, L/100 km
— city
— highway
— combined
Oil consumption, gr/1000 km up to 1000
Recommended engine oil 5W-30
Engine oil capacity, liter 5.2
Oil change interval, km 10000
(better 5000)
Normal engine operating temperature, °C
Engine lifespan, km
— official information
— real


Frequent problems

Engine Toyota 1GRUnits that came out before restyling, equipped with a single VVTi, are characterized by resistance to oil leakage through the oil line. However, there is another, no less serious drawback. With high mileage, the engine often overheats, which leads to wear of the gaskets on the cylinder head. Therefore, it is extremely important to control the cooling system.

Chirping during operation is present on almost all modifications of the unit. This is normal injector background noise. A similar sound in the form of a clatter is observed from the functioning of the ventilation system of gasoline fumes.

On the Toyota 1GR engine, there are no hydraulic lifters in the design. For this reason, every one hundred thousand kilometers you need to readjust the valve clearances using shims. In practice, as a rule, no one is fond of this. Therefore, problems associated with this are not excluded.

With good and regular maintenance, the engine can run for 300 thousand km or more. The main disadvantages are similar to the 2GR version of the unit.

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