Mercedes-Benz OM601 engine

The Mercedes-Benz OM601 is an inline-four diesel passenger car engine that Mercedes-Benz built from 1983 to 2000. It succeeded the OM616 and was in turn followed by the double overhead camshaft OM604 in 1993, and it belongs to the same family generation as the five-cylinder OM602 and the six-cylinder OM603. The design uses an iron block with an aluminum head, with the camshaft and the fuel injection pump driven by a duplex chain from the crankshaft and a separate single-row chain for the oil pump. Fuel reaches the cylinders by indirect injection through a pre-chamber, and the mechanical injection pump carries a governor, altitude compensation and load-sensing idle control. Seven variants in three displacements were offered.