Skip to main content 

OM400 series engine specifications and manuals - amp

Welcome you're on our amp page providing Mercedes OM400 series engine Manuals, Specs and bolt torques

Inter Club Navigation
 Home Page   Membership   Contact Us    Club Matters   Engine List   Technical  Videos 

Click for:
Info on
basic engine specs

Basic specs are free
 and open to everyone

They usually include
engine images, displacement, 
dimensions and weight, 
essential bolt tightening torques, 

characteristics of the engine 
e.g. its power and torque. 

Essential bolt tightening torques are
 main bearing cap bolt torque, 
 connecting rod cap bolt torque 
 and the cylinder head bolt torques.
 


 
Click for: Cummins engine specs   Click for: CAT Diesel engine Specs   Click for: Detroit Diesel specs   Click for: ADE diesel engine specs   Click for: Deutz diesel engine specs

Click for:
Info on
manuals and books

You need club membership 
for your engine manuals or parts books.

Subscribe for Membership 
if you need manuals continually

or 

Take a one week membership window
 if you only need manuals 
 for a specific engine.
 


 

Workshop manuals, specs and bolt torques for OM400 engines - amp

 
Click image:
to view OM402 engine
click text to close
 
Click for:
Other Diesel Engine
manuals and specs
 

Mercedes OM400 Essential Diesel Engine Bolt Tightening Torques

 
OM400 engines Mercedes
Main Bearing capscrews

Step 1 = 100 Nm
Step 2 = 200 Nm
Step 3 = 300 Nm
Step 4 = + 90 degrees
Step 5 = + 10 degrees

Click for OM400 series 
engine manuals and specs 
 
OM400 engines Mercedes
Connecting Rod Bolts

Step 1 = 45 Nm
Step 2 = 100 Nm
Step 3 = + 90 degrees
Step 4 = + 10 degrees

Click for OM400 series 
engine manuals and specs  
 
OM400 engines Mercedes
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

Click for OM400 series 
engine manuals and specs 
 

OM400 engines Data Sheet

 
Firing orders for the om400 engines 
Click to view

OM401 Data Sheet 
with detailed specs 
Click to view

OM400 engines Diesel Engine Specs

 
OM400 engines Mercedes
Displacement,
bore and stroke

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

Bore
125 mm, 4.92 in 

Stroke
130 mm, 5.12 in

Click for OM400 series 
engine manuals and specs
 
OM400 engines Mercedes
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 

Click for OM400 series 
engine manuals and specs 
 
OM400 engines Mercedes
Weight, compression ratio,
power, torque

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

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 

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 

Click for OM400 series 
engine manuals and specs
 

More Diesel Engine Specs, Bolt torques and manuals

Click for Index to More Diesel Engine Manuals, bolt torques, specs


 
Membership
 Membership - Sign Up  More about Membership  Login 
 
Home Page 
  Home - Desktop    Home - Mobile 
 
Engine List 
  Engine List - Desktop    Engine List - Mobile 
 
Club Matters
More About Us  Terms and Conditions  Acknowledgements  Site Map  Privacy Policy 


Page Revision #8.4RsC AMP 10-18