Mercedes OM457 engine specs data sheet

Mercedes OM457 Data Sheet Elements

OM457 bolt tightening torques

Main Bearing Bolts 
step 1 = 100 Nm
step 2 = 200 Nm
step 3 = + 30 degrees
step 4 = + 90-100 degrees

Connecting Rod Bolts
Step 1	100 - 110 Nm	
Step 2	90 degrees - 100 degrees

Cylinder head Bolts
Step 1	10 Nm	
Step 2	50 Nm	
Step 3	100 Nm	
Step 4	200 Nm	
Step 5	90 degrees	
Step 6	90 degrees	

When New Bolts are fitted additional 
steps are required:
.Release 90 - 100 degrees	
·Step 7	90 degrees	
·Step 8	90 degrees

Other bolt torques
Vibration Damper to Crankshaft 200 Nm	

Flywheel		
Step 1	210 Nm	
Step 2	90 degrees	

Injector Nozzle	40 Nm	
Injector Holder	60 Nm

OM457 specifications

Arrangement
OM457LA
6 Cylinder In-Line
4-stroke cycle
turbocharged
intercooled

Dimensions
length - 1365 mm
width 830 mm
height 1110 mm

Designations
German - English
A = Abgasturboaufgeladen - Turbocharged = T
L = ladeluftgekuhlt - Intercooled = I 
OM = Diesel engine = ADE

Displacement
11.97 liter, 730 CID

Compression ratio:
457LA 17.25:1

Weight approx:
920 kg, 2028 lb

Power 
OM457LA
265 kW @ 2100 rpm
242 kW @ 1800 rpm

Torque 
OM457LA
1600 Nm @ 1200 rpm

Cylinder Head
Height new	113.85 to 114.15 mm	
Minimum	113.5 mm

Valves
Clearance
Inlet 0.40 mm	
Exhaust	0.60 mm	

Valve Head Diameter
Inlet 45.5 mm	
Exhaust	41.0 mm

Valve Length New
Inlet 145.0 mm	
Exhaust 145.0 mm

Valve stem diameter New
Inlet 9.0 mm	
Exhaust 9.0 mm

Valve Seat Angle
Inlet 30  degrees
Exhaust	45  degrees

Clearance - Valve Disc 
to Cylinder Head (Surface)
Inlet 0.70 to 1.10 mm 
MAX: 1.60 mm	

Exhaust 0.70 to 1.10 mm 
MAX: 1.60 mm

Block
Cylinder Sleeve
Protrusion 0.23 to 0.33 mm	

Main Bearing Tunnel
ID 111.000 to 111.022 mm

Crankshaft - Standard
Main Bearing Journal
103.980 to 104.000 mm
Main Bearing Radial Clearance
0.044 to 0.111 mm

Connecting Rod Journal
89.980 to 90.000 mm
Connecting Rod Radial Clearance
0.044 to 0.111 mm

Connecting Rod
Big End ID
103.980 to 104.000 mm