Engine specifications (Mercedes-Benz E-Class W124)

Engine code:
– 4-cylinder 2.0L engine	601,912
– 5-cylinder 2.5 l engine:
• without turbocharging	602,912
• turbocharged	602,962
– 6-cylinder 3.0 l engine:
• without turbocharging	603,912
• turbocharged	603,960, 603,962 or 603,963
Working volume:
– 2.0 l engine	1997 cm³
– 2.5 l engine	2497 cm³
– 3.0 l engine	2996 cm³
Cylinder diameter	87.0 mm
Piston stroke	84.0 mm
Direction of rotation of the engine crankshaft	Clockwise when viewed from the front of the vehicle
Location of cylinder #1	From the drive chain side
The order of operation of the cylinders:
– 2.0 l engine	1 – 3 – 4 – 2
– 2.5 l engine	1 – 2 – 4 – 5 – 3
– 3.0 l engine	1 – 5 – 3 – 6 – 2 – 4
Compression pressure:
- minimum acceptable	18.0 bar
– the maximum difference between any two cylinders	3.0 bar
Compression ratio	22,0: 1

Camshaft

Axial clearance:
- nominal	0.030 – 0.100 mm
- maximum permissible	0.150 mm
Working clearance of camshaft bearings:
- nominal	0.050 – 0.091 mm
- maximum permissible	0.150 mm
Maximum clearance between camshaft cam and valve tappet	0.40 mm

Maximum permissible length of cylinder head mounting bolts

Bolt M10 x 80	83.6 mm
Bolts M10 x 102	105.6 mm
Bolts M10 x 115	118.6 mm

Lubrication system

Minimum oil pressure generated by the oil pump:
- at idle speed	0.3 bar
– at 3,000 rpm	3.0 bar

Flywheel/Drive Plate Mounting Bolts

Minimum diameter	8.0 mm
Maximum length	22.5 mm

Tightening moments

Cylinder head cover mounting bolts	10 Nm
Crankshaft Pulley/Vibration Damper to Hub Bolts	25 Nm
Bolt for fastening the hub to the crankshaft:
- bolt with disc washers	320 Nm
– bolt with conical washer:
• stage 1	200 Nm
• stage 2	Turn to an angle of 90°
Drive chain cover mounting bolts:
– M6 bolts	10 Nm
– M8 bolts	25 Nm
Radiator Fan Pulley Mounting Bolts:
- hex head bolt	10 Nm
- end bolt	14 Nm
Auxiliary drive belt tensioner mounting bolt	10 Nm
Auxiliary drive belt tensioner pivot pin	100 Nm
Auxiliary drive belt intermediate pulley mounting bolt	25 Nm
Bolts for fastening the shock absorber strut of the auxiliary drive belt tensioner mechanism:
- top bolt	25 Nm
- lower bolt	20 Nm
Self-leveling rear suspension pump mounting bolts:
- hex head bolt	25 Nm
- combined bolt:
• stage 1	25 Nm
• stage 2	Turn to an angle of 90°
Camshaft Sprocket Mounting Bolt:
- bolt M10	65 Nm
– bolt M11:
• stage 1	25 Nm
• stage 2	Turn to an angle of 90°
Fastening the plug to the housing of the drive chain tensioning mechanism	40 Nm
Fastening the drive chain tensioner housing to the cylinder block	80 Nm
Camshaft Bearing Cap Fastening Bolts	25 Nm
Bolts securing the timing chain cover to the cylinder head	25 Nm
Fuel filter mounting bolts	25 Nm
Cylinder head mounting bolts:
- stage 1	15 Nm
- stage 2	35 Nm
- stage 3	Turn to an angle of 90°
- stage 4	Take a 10 minute break
- stage 5	Turn to an angle of 90°
Gearbox to engine mounting bolts:
– manual transmission:
• bolts M10 x 40	55 Nm
• bolts M10 x 90	45 Nm
– automatic transmission:
• M10 bolts	55 Nm
• M12 bolts	65 Nm
Oil pan additional part mounting bolts	10 Nm
Oil pan mounting bolts:
– M6 bolts	10 Nm
– M8 bolts	25 Nm
Oil drain plug:
– M12 bolts	30 Nm
– M14 bolts	25 Nm
Oil pressure relief valve plug	50 Nm
Oil pump sprocket mounting bolt	32 Nm
Oil pump mounting bolts	25 Nm
Oil catcher plate mounting bolts	25 Nm
Flywheel/Drive Plate Mounting Bolts:
– stage 1:
• standard flywheel	30 Nm
• flywheel with double mass	40 Nm
- stage 2	Turn to an angle of 90 – 100°
Crankshaft rear cover mounting bolts	10 Nm
Powertrain support bracket mounting bolts	55 Nm
Bolts for fastening the power unit support to the crossmember	40 Nm
Bolts securing the powertrain support bracket to the engine	25 Nm
Connecting rod bearing cap fastening nuts:
– stage 1:
• models before November 1990	30 Nm
• models from December 1990	40 Nm
- stage 2	Turn to an angle of 90 – 100°
Main bearing cap mounting bolts:
– bolts M11:
• stage 1	55 Nm
• stage 2	Turn to an angle of 90 – 100°
– M12 bolts	90 Nm
Coolant drain plug from the engine cylinder block	30 Nm