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OM661 and OM662 Essential Diesel Engine Bolt Tightening Torques


OM661, OM662 Mercedes Main Bearing Bolts
Step 1 = 55 Nm
Step 2 = +90 degrees

OM661, OM662 Mercedes Connecting Rod Bolts
Step 1 = 35 Nm
Step 2 = +90 degrees

OM661, OM662 Mercedes Cylinder Head Bolts
12 Sided socket head bolts
Stage 1 = 10 Nm
Stage 2 = 35 Nm
Stage 3 = + 180 degrees

OM661 and OM662 Diesel Engine Specs


OM661, OM662 Mercedes Arrangement

in line 4 engine,
4-stroke cycle
turbo intercooled

in line 5 engine
4-stroke cycle
turbo intercooled

OM661, OM662 Mercedes Displacement, bore, stroke

2.3 liter

2.9 liter

89.0 mm

92.4 mm

OM661, OM662 Mercedes Power and compression ratio

74 kW @ 4000

88 kW @ 4000

Compression ratio

Mercedes Designations German - English

A = Turbocharger = T
L = Intercooler = I
OM = Diesel engine = ADE

Mercedes Diesel engine Specs, Bolt torques and manuals

Many ADE Engines were made under licence to Mercedes,
and are mostly identical engines that enjoy the same parts and procedures as Mercedes OM engines

Mercedes Diesel engine manuals and specs
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