The M112 E28 engine appeared in 1997 and was positioned as a replacement for the in-line M104 E28. The new engine was based on the M112 E32 cylinder block, where a crankshaft with a smaller piston stroke was placed.
The V6-family includes: M112 E24, M112 E26, M112 E28, M112 E32, M112 E37, M272 E25, M272 E30, M272 E35, M276 DE30, M276 DE35.
The cylinder heads are similar to those used on the M112 E32: aluminum, with one camshaft and three valves per cylinder (two intake, one exhaust). The diameter of the intake valves is 36 mm, exhaust 41 mm. Everything also uses a variable valve timing system, hydraulic lifters and an intake manifold with adjustable length. Timing chain drive, average chain life is about 200 thousand km. Bosch Motronic ME 2.0 control system.
|Fuel system||distributed injection|
|Power output, hp||197 – 204|
|Torque output, Nm||265 – 270|
|Cylinder block||aluminum V6|
|Block head||aluminum 18v|
|Cylinder bore, mm||89.9|
|Piston stroke, mm||73.5|
|Timing drive||double row chain|
|Recommended engine oil||5W-30|
|Engine oil capacity, liter||7.5|
|Euro standards||EURO 3/4|
|Fuel consumption, L/100 km (for E280 W210)
|Engine lifespan, km||~330 000|
Disadvantages of the M112 E28 engine
- The signature failure of this series of engines is the destruction of the crankshaft pulley.
- The remaining engine problems are somehow related to increased oil consumption.
- Due to contamination of the crankcase ventilation, grease creeps out from under the gaskets and seals.
- The main cause of oil burnout here is usually in hardened valve stem seals.
- Lubrication leak points are also the oil filter housing and heat exchanger.