The 4.2-liter Toyota 1HZ engine has been produced in Japan since 1990 and is still installed on the Land Cruiser 70 SUV, which is popular in a number of countries. The atmospheric diesel engine with a single 12-valve camshaft is an example of reliable and unpretentious technology.
Although these motors were installed on large SUVs, their strong point is by no means outstanding power figures. With such a large volume of 4.2 liters, the engine produces only 129-131 hp. However, 1HZ engines have a lot of mileage potential, many people think they can go 1 million kilometers. They are able to use almost any diesel fuel, endure extreme temperatures, while they practically do not suffer from minor breakdowns and have a reliable cylinder-piston group that is subject to major repairs and boring.
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The engine was installed on:
- Toyota Land Cruiser 70 (J70) since 1990;
- Toyota Land Cruiser 100 (J100) in 1998 – 2007;
- Toyota Coaster 2 (B20) in 1990 – 1993; Coaster 3 (B40) in 1993 – 2003.
|Production years||since 1990|
|Fuel system||vortex chamber IDI|
|Power output, hp||129 – 131|
|Torque output, Nm||271 – 290|
|Cylinder block||cast iron R6|
|Block head||cast iron 12v|
|Cylinder bore, mm||94|
|Piston stroke, mm||100|
|Recommended engine oil||5W-30
|Engine oil capacity, liter||9.3|
|Euro standards||EURO 1|
|Fuel consumption, L/100 km (for Toyota Land Cruiser 100 2001)
|Engine lifespan, km||~600 000|
- it is necessary to adjust the thermal clearances of the valves every 50,000 km;
- the timing belt has to be changed about once every 100 thousand kilometers;
- the injection pump system suffers on almost all engines by 500 thousand mileage;
- special installation of ignition tags is required;
- Poor fuel quality slowly destroys the piston group and valves.
Otherwise, the reliability of this diesel engine is exemplary.