The basis for the creation of a small V8 M60B30 was the M60B40, in the cylinder block of which a short-stroke cast crankshaft was installed (stroke 67.6 mm versus 80 mm for the M60B40), and the cylinder diameter was reduced to 84 mm (was 89 mm). Changed, respectively, pistons and connecting rods.
Cylinder heads from a 4-liter engine, with reduced intake valves to 32 mm (were 35 mm), exhaust valves to 28.5 mm (were 30.5 mm). Characteristics of standard BMW M60B30 camshafts: phase 246/242, rise 9.7/9.4 mm.
The M60B30 still uses individual ignition coils, a double-row timing chain and a plastic intake manifold, but compared to the M60B40, with a smaller diameter of channels, the throttle is also reduced to 70 mm. Bosch Motronic 3.3 engine management system.
Other modifications of M60: M60B40.
|Power output, hp||218 /5800 rpm|
|Torque output, Nm||290 /4500 rpm|
|Cylinder block||aluminum V8|
|Block head||aluminum 32v|
|Cylinder bore, mm||84|
|Piston stroke, mm||67.6|
|Recommended engine oil||5W-30|
|Engine oil capacity, liter||7.5|
|Euro standards||EURO 1|
|Fuel consumption, L/100 km (for BMW 730i 1993)
|Engine lifespan, km||~300 000|
Disadvantages of the M60B30 engine
- Until 1994, a nikasil coating was used, which is very afraid of sulfur in the fuel;
- From vibrations of the engine at idle, adjusting the valve timing often helps;
- The reason for the oil burner is in the valve stem seals or the crankcase ventilation system;
- The oil pump screws may loosen and fall into the sump, it is advisable to check them;
- Factory catalysts had a small resource and the owners got rid of them.