The M112 E26 engine – one of the youngest representatives in the extensive family of M112 engines appeared in 2000 as a replacement for the M112 E24 and was intended for Mercedes models with an index of 240.
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 engine is based on a cylinder block from the M112 E28, in which a crankshaft with an even smaller piston stroke was placed. The cylinder heads are the same as on the M112 E28: aluminum, with one camshaft (SOHC) and three valves per cylinder: two intake, one exhaust. The diameter of the intake valves is 36 mm, the exhaust valves are 41 mm. There is a variable valve timing system, hydraulic lifters, an intake manifold with variable length.
Specifications
| Production years | 2000-2006 |
| Displacement, cc | 2597 |
| Fuel system | distributed injection |
| Power output, hp | 170 – 177 |
| Torque output, Nm | 240 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 18v |
| Cylinder bore, mm | 89.9 |
| Piston stroke, mm | 68.2 |
| Compression ratio | 11.0 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.5 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for E240 W211) — city — highway — combined |
15.4 7.4 10.5 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 160 |
Disadvantages of the M112 E26 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.
