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Popular Diesel Engine Specs

Mercedes OM400 Essential Diesel Engine Bolt Tightening Torques

 
Mercedes OM400 
Main Bearing cap screws
Step 1 = 100 Nm
Step 2 = 200 Nm
Step 3 = 300 Nm
Step 4 = + 90 degrees
Step 5 = + 10 degrees

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engine manuals and specs
 
Mercedes OM400 
Connecting Rod Bolts
Step 1 = 45 Nm
Step 2 = 100 Nm
Step 3 = + 90 degrees
Step 4 = + 10 degrees

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Mercedes OM400 
Cylinder head Bolts
Step 1 = 10 Nm
Step 2 = 50 Nm
Step 3 = 100 Nm
Step 4 = 140 Nm
Step 5 = +90 degrees 
Step 6 = +10 degrees

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OM400 Diesel Engine Specs

 
Mercedes OM400
Bore, stroke
and displacement

Bore
125 mm, 4.92 in 

Stroke
130 mm, 5.12 in

Displacement
OM401 -  9.57 liter,  584 CID
OM402 - 12.76 liter,  779 CID
OM403 - 15.95 liter,  973 CID
OM404 - 19.12 liter, 1168 CID

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Mercedes OM400
Arrangement

OM401 - 6v Natural Aspiration
OM401LA - 6v Turbo Aftercooled

OM402 - 8v Natural Aspiration 
OM402LA - 8v Turbo Aftercooled 

OM403 - 10v Natural Aspiration 

OM404 - 12v Natural Aspiration
OM404LA - 12v Turbo Aftercooled 

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Mercedes OM400
Weight and compression ratio

Weight:
approx:
OM401 - 700 Kg
OM401LA - 760 Kg

OM402 - 815 Kg 
OM402LA - 875 Kg

OM403 - 965 Kg 

OM404 - 1115 Kg
OM404LA - 1200 Kg

Compression ratio:
Natural Aspiration 17.2:1

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Mercedes OM400
Power

OM401 - 189 hp, 141 kW @ 2500 rpm
OM401LA - 296 hp, 221 kW @ 2500 rpm

OM402 - 252 hp, 188 kW @ 2500 rpm 
OM402LA - 295 hp, 220 kW @ 2500 rpm 

OM403 - 315 hp, 235 kW @ 2500 rpm

OM404 - 378 hp, 282 kW @ 2500 rpm
OM404LA - 443 hp, 330 kW @ 2500 rpm 

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Mercedes OM400
Torque

OM401 - 462 lb.ft, 627 Nm @ 1300 rpm
OM401LA - 540 lb.ft, 734 Nm @ 1300 rpm

OM402 - 616 lb.ft, 836 Nm @ 1300 rpm 
OM402LA - 721 lb.ft, 978 Nm @ 1300 rpm 

OM403 - 760 lb.ft, 1030 Nm @ 1500 rpm

OM404 - 912 lb.ft, 1236 Nm @ 1300 rpm
OM404LA - 1247 lb.ft, 1690 Nm @ 1300 rpm 

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firing orders om400 engines
Firing orders for the om400 engines


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