The M42 B18 is a 1796cc water-cooled gasoline engine. and a power of 136 hp. Fuel injection system – Bosch Montronic M1.7. The catalytic converter engine versions developed a power of 100 kW and a torque of 170 Nm and met Euro 2 standards.
Specifications
Manufacturer | Munich Plant |
Also called | M42 |
Production years | 1989-1996 |
Cylinder block alloy | cast iron |
Fuel system | injector |
Configuration | inline |
Number of cylinders | 4 |
Valves per cylinder | 4 |
Piston stroke, mm | 81 |
Cylinder bore, mm | 84 |
Compression ratio | 10 |
Displacement, cc | 1796 |
Power output, hp | 140/6000 |
Torque output, Nm / rpm | 175/4500 |
Fuel type | 95 |
Euro standards | Euro 2 |
Weight, kg | — |
Fuel consumption, L/100 km — city — highway — combined |
10.9 6.4 7.7 |
Oil consumption, gr/1000 km | up to 1000 |
Recommended engine oil | 0W-30 / 0W-40 / 5W-30 / 5W-40 / 10W-40 |
Engine oil capacity, liter | 5.0 |
Oil change interval, km | 7000-10000 |
Normal engine operating temperature, °C | 90-95 | Engine lifespan, km — official information — real |
— 300+ |
Frequent problems
Among the problems typical for the M42B18: unstable rpm, knocking, jolts during acceleration, overheating.
A knock in the power unit appears due to wear on the camshaft, hydraulic lifters and rocker arms. Verification required.
If the revolutions are unstable, the reason may be hidden in the violation of the integrity of the duct, air leaks are possible. They also inspect the lambda probe, DMRV, KXX and the throttle valve. If the camshaft is difficult to rotate, this causes a floating speed problem.
The engine begins to overheat when the pump, radiator, thermostat breaks down. Air pockets in the cooling system may be the cause. You also need to check the integrity of the plastic pipes in the cooling system.
When the engine jerks during acceleration, it is most likely that the injectors need to be cleaned. If the engine does not start, check the spark plugs, the fuel pump, the ignition coil, and high-voltage wires.
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