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Mercedes OM904-906 specs, bolt torques, spec sheets, manuals



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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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OM904 bolt torques, specifications and manuals


Useful information for owners and repairers of OM904 engines

OM904 and OM906 essential bolt tightening torques

Main Bearing Bolts 
step 1 = 30 Nm
step 2 = 80 Nm
step 3 = 155 Nm
step 4 = + 90°

Connecting Rod Bolts
step 1 = 10 Nm
step 1 = 45 Nm
step 3 = + 90°

Cylinder head Bolts
step 1 = 20 Nm
step 2 = 70 Nm
step 3 = 170 Nm
step 4 = 280 Nm
step 5 = + 90°
step 6 = + 90°


OM904 and OM906 manuals and other literature

OM904, OM906 key specs

Arrangement
OM904LA
in-line 4 cylinder engine, 
4-stroke cycle
turbocharged
intercooled

Arrangement
OM906LA
in-line 6 cylinder engine, 
4-stroke cycle
turbocharged
intercooled

Compression ratio:
18.0:1

Displacement
OM904
4.25 liter, 259 CID

OM906
6.4 liter, 390 CID

Bore
102 mm, 4.02 in

Stroke
130 mm, 5.12 in

Power 
 OM904LA
75-130 kW, @2200 rpm

 OM906LA
170-205 kW, @2200 rpm

Torque 
 OM904LA
400-670 Nm, @1200-1600 rpm

 OM906LA
810-1100 Nm, @1200-1600 rpm


Dimensions approx:
 OM904LA
length = 830 mm
width = 645 mm
height = 925 mm

 OM906LA
length = 1078 mm
width = 645 mm
height = 940 mm

Weight approx:
 OM904LA
365 kg, 803 lb

 OM906LA
530 kg, 1166 lb



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Phone: +27 72 754 4660
email: steve@barringtondieselclub.co.za
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