The Land Cruiser 70 SUV, which is well-liked in many nations, still has the 4.2-liter Toyota 1HZ engine, which has been manufactured in Japan since 1990. One example of dependable and unassuming technology is the atmospheric diesel engine with a single 12-valve camshaft.
Despite the fact that these motors were installed on large SUVs, their power figures are by no means exceptional. Despite having a 4.2-liter capacity, the engine only generates 129–131 horsepower. Nonetheless, 1HZ engines have a great potential for mileage; many believe they can travel a million kilometers. They have a dependable cylinder-piston group that is prone to major repairs and boring, can run on nearly any diesel fuel, withstand high temperatures, and virtually never experience minor malfunctions.
Engine manual Toyota 1HZ (download).
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.
Specifications
| Production years | since 1990 |
| Displacement, cc | 4164 |
| 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 |
| Compression ratio | 22.4 22.7 |
| Features | no |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 10W-30 15W-40 20W-50 |
| Engine oil capacity, liter | 9.3 |
| Fuel type | diesel |
| Euro standards | EURO 1 |
| Fuel consumption, L/100 km (for Toyota Land Cruiser 100 2001) — city — highway — combined |
14.1 10.8 11.1 |
| Engine lifespan, km | ~600 000 |
| Weight, kg | 300 |
Frequent problems
Every 50,000 kilometers, the thermal clearances of the valves must be adjusted; the timing belt must be replaced roughly every 100,000 kilometers; the injection pump system deteriorates by 500,000 miles on nearly all engines; special installation of ignition tags is necessary; and poor fuel quality gradually destroys the piston group and valves.
Other than that, this diesel engine’s dependability is excellent.