Mercedes-Benz OM603 engine

Common card · No. 249345

The OM603 engine is a straight-6 Diesel automobile engine from Mercedes-Benz used from 1984 through 1999. The OM603 saw use in W124, W126 and W140 model vehicles, as well as limited use in the Swedish Bandvagn BV206. It is closely related to the 4 cylinder OM601 and the 5 cylinder OM602 engine families of the same era. The 603.96 engine has a capacity of 2,996 cc (182.8 cu in) and was a development of the reliable 5 cylinder OM617 engine. It produced 143 hp at 4600 rpm (euro market without catalytic converter produced 148hp) and 195 ft.lb at 2400 rpm with a compression ratio of 22.0:1. Versions 603.96x and 603.97x are turbocharged. Only turbocharged models of the 603 series were available to the U.S. market. The single camshaft and injection pump are driven by duplex chain from the crankshaft. A separate single row chain drives the oil pump. The camshaft operated the valves via hydraulic bucket tappets; valve clearance adjustment is automatic. Fuel is injected into a pre-combustion chamber...

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