Mercedes-Benz OM604 engine

Mercedes-Benz OM604 engine
Overview
Manufacturer	Mercedes-Benz
Production	1993–1998
Combustion chamber
Configuration	Straight-4
Displacement	2.0 L (1997 cc) 2.2 L (2155 cc)
Cylinder block alloy	Cast iron
Valvetrain	DOHC 16 valves
Compression ratio	22.0:1
Combustion
Turbocharger	No
Fuel system	Indirect injection
Fuel type	Diesel fuel
Chronology
Predecessor	Mercedes-Benz OM601 engine
Successor	Mercedes-Benz OM611 engine

The Mercedes-Benz OM604 is a 2.0 and 2.2 litre inline-four cylinder (R4/I4) double overhead camshaft (DOHC) diesel engine with indirect injection manufactured by Mercedes-Benz between 1993 and 1998. It replaced the single overhead camshaft (SOHC) OM601 engine. Unlike other Mercedes Benz diesels at the time that used a Bosch inline injection pump the OM604 used the Lucas electronically controlled rotary distributor injection pump (EVE) which is less reliable. The seals of the Lucas injection pumps become brittle over time and leak. Since the replacement of the entire injection pump is very expensive, a repair kit is offered in which the affected seals are replaced.

It is related to the straight-5 2.5 litre OM605 and the straight-6 3.0 litre OM606 engines.

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Wikipedia