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Mercedes OM661 and OM662 workshop repair manual, specifications



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Basic specs are open to everyone and include images, displacement, dimensions and weight, essential bolt tightening torques, the characteristics of the engine like its power and torque. Essential bolt tightening torques are the main bearing cap bolt torque, the connecting rod cap bolt torque and the cylinder head bolt torques.


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Mercedes OM661 and OM662 specs, bolt torques, workshop repair manual

Mercedes OM661 and OM662 engine repair and specifications manual


OM661 and OM662 essential bolt tightening torques

Main Bearing Bolts 
Step 1 = 55 Nm
Step 2 = +90°

Connecting Rod Bolts
Step 1 = 35 Nm
Step 2 = +90°

Cylinder head 
12 sided socket head Bolts
Stage 1 = 10 Nm
Stage 2 = 35 Nm
Stage 3 = + 180°


Mercedes OM661 and OM662 key specifications

Arrangement
OM661
in line 4 engine, 
4-stroke cycle
turbo intercooled

OM662
in line 5 engine, 
4-stroke cycle
turbo intercooled

Displacement
OM661
2.3 liter

OM662
2.9 liter

Bore
89.0 mm

Stroke
92.4 mm

Power 
 OM661
74 kW @ 4000

 OM662
88 kW @ 4000

Compression ratio:
22:1



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