Engine Mercedes M272 KE/DE 35

The M272 E 35 power unit was the evolution of the Mercedes V6 and was supposed to replace the M112 E32 and M112 E37. In addition to the 3.5-liter engine, the lineup includes the 2.5-liter M272 E25 and the 3.0-liter M272 E30. The development of the 272 series was carried out on the basis of the M112, which includes an aluminum BC with a camber of 90 degrees and 106 mm between the cylinders. Silumin steel piston liners with a diameter of 92.6 mm. And the new crankshaft received 86 mm of travel. The pistons and forged connecting rods are somewhat lighter. Continue reading Engine Mercedes M272 KE/DE 35

Engine Mercedes M111 E20/E20 ML

Back in 1992, the outdated 4-cylinder E20 engine from the M102 engine series was replaced by the M111 series engines. The new M111 line includes such legendary engines as M111E18, M111E22 and M111E23. The new 2.0-liter engine differed from its predecessor first of all: a completely new cylinder block, which was made of cast iron, a new crankshaft, as well as a new connecting rod and piston group. On the M111 E20 engine, the cylinder head had 4 valves per cylinder and two camshafts. The design provided for a place for hydraulic lifters, as well as an electronic fuel injection system. Continue reading Engine Mercedes M111 E20/E20 ML

Engine Mercedes M111 E23/E23 ML

In 1995, the last and most voluminous engine in the M111 line of engines came out – this is a 2.3-liter M111 E23 engine. It was intended to replace the completely outdated M102 E23 engine technology. At the heart of the E23 is a cast iron cylinder block, with a bore of 90.9 mm, the piston stroke was increased to 88.4 mm, which is 7.9 mm more than in the 2.0-liter version. Continue reading Engine Mercedes M111 E23/E23 ML

Engine Mercedes M112 E37

In 2002, another version of the M112 engine appeared – the E37 with a volume of 3.7 liters. This option is recognized as the largest in the series. To increase the volume, the BC was changed for a piston with a large diameter. The cylinder head does not differ from the base M112: it has one camshaft and 3 valves per cylinder. The head uses the IFGR system, hydraulic lifters and an intake manifold with an adjustable length. The average resource of the timing chain drive reaches 200,000 km, which is an undoubted plus. The disadvantages include excessive oil consumption, oil leaks, delamination of the crankshaft pulley damper. As with all engines, high-quality consumables and gentle driving style are relevant for the M112 E37. Continue reading Engine Mercedes M112 E37

Engine Mercedes M112 E32

In 1997, the new M112 E32 engine replaced the old E32 engine from the M104 series. The main difference between the new series and the old one was that now the motors became V-shaped with a breakup angle of 90 degrees. The move away from the in-line arrangement of the cylinders allowed the engine to be made more compact and to unify 6- and 8-cylinder engines as much as possible, which, in turn, made it possible to install both series of engines in the same car models. Continue reading Engine Mercedes M112 E32