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Overview

mercedes-benz om602

The successor of the OM617 engine family was the newly developed straight-5 diesel automobile engine OM602 from Mercedes-Benz used from 1980s up to 2002. With some OM602 Powered Mercedes-Benz vehicles exceeding 500,000 or 1,000,000 miles , it is considered to be one of the most reliable engines ever produced, a success which is only comparable with the famous OM617 engine.
It is closely related to the 4 cylinder OM601 and the 6 cylinder OM603 engine families of the same era....

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technical specifications

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General

engine brand: mercedes-benz
production years: 1985-2001
engine lifespan: ~450 000
features: no (D25, D25A, D29)
intercooler (DE29LA)

piston

Power and torque

power: 84 – 94 (D25)
122 – 126 (D25A)
95 – 98 (D29)
120 – 129 (DE29LA)
torque: 154 – 158 (D25)
225 – 231 (D25A)
192 (D29)
280 – 300 (DE29LA)

gas-pump

Fuel

fuel system: prechamber
fuel type: diesel
euro standards: EURO 1

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Timing

timing drive: chain
hydraulic lifters: yes
phase regulator: no

engine-oil-level

Oil

recommended engine oil: 5W-40
engine oil capacity: 7.0

turbocharger

Displacement and turbo

displacement: 2497 (OM 602 D 25 or 250D, OM 602 D 25 A or 250TD)
2874 (OM 602 D 29 or 290D, OM 602 DE 29 LA or 290TD)
compression ratio: 22.0 (D25, D25A, D29)
19.5 (DE29LA)
turbocharging: no (D25)
yes (D25A)
no (D29)
yes (DE29LA)

height

Dimensions and measurements

weight: 205
cylinder bore: 87 (D25, D25A)
89 (D29, DE29LA)
piston stroke: 84 (D25, D25A)
92.4 (D29, DE29LA)

engine

Engine block

cylinder block: cast iron R5
block head: aluminum 10v