Mercedes OM444 Manuals, Engine Specifications & Bolt Torques

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OM444 Mercedes
Main Bearing Cap Screws

Center 156 mm max
Step 1 = 100 Nm
Step 2 = 200 Nm
Step 3 = 330 Nm
Step 4 = + 90-100 degrees

Main Bearing Cap Screws - Lateral
Step 1 = 80 Nm

OM444 Mercedes
Connecting Rod Bolts

Step 1 = 100 Nm
Step 2 = + 90-100 degrees

OM444 Mercedes
Cylinder Head Bolts

Step 1 = 10 Nm
Step 2 = 50 Nm
Step 3 = 100 Nm
Step 4 = 140-150 Nm
Step 5 = 180-190 Nm
Step 6 = + 90-100 degrees

Mercedes Designations
German - English

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

Example
OM366 = ADE366N
OM366A = ADE366T
OM366LA = ADE366TI
OM442LA = ADE442TI

Mercedes OM444
Displacement, Bore, Stroke,
Compression Ratio, Weight

Displacement
OM444 - 22.618 liter

Bore
ADE
Naturally aspirated = 130 mm

Other
Turbo models = 128.00 mm

Stroke
142.00 mm

Compression ratio
Naturally aspirated = 16.9:1
Turbocharged = 16.25:1

Weight
approx
OM444 - 1115 kg
OM444A - 1165 kg
OM444LA - 1220 kg

OM444 Mercedes
Arrangement

OM444
v12 engine
4-stroke cycle
Naturally aspirated

OM444A
v12 engine
4-stroke cycle
Turbocharged

OM444LA
v12 engine
4-stroke cycle
Turbocharged
Intercooled

OM444 Mercedes
Power and torque

Power
OM444 - 320 kW @ 2100 rpm
OM444A - 390 kW @ 2100 rpm
OM444LA - 480 kW @ 2100 rpm

Torque
OM444 - 1650 Nm @ 1200 rpm
OM444A - 2400 Nm @ 1200 rpm
OM444LA - 2650 Nm @ 1200 rpm