Engine cooling and lubrication system M102 Mercedes E-Class (W123)

Lubrication system design
Engine lubrication system M 102 1 - oil sump; 2 - oil dipstick; 3 - crankshaft; 4 - oil pump drive clutch; 5 - internal gear of the oil pump; 6 - external gear of the...

Removal and installation of the oil pump
Section of the oil pump of the M102 engine Removing The oil pump can be removed on the vehicle by first removing the timing cover. Intermediate shaft lubrication A - on...

Oil pressure check
1. Disconnect the connector from the emergency oil pressure sensor. 2. Unscrew the pressure sensor. Install a pressure gauge to check oil pressure. 3. Start and warm up...

Cooling system design
Engine cooling system M 102 A - fan with thermostatic clutch; B - fan with electromagnetic clutch; B - fan drive with a multi-ribbed belt; G - fan drive with a V-belt; 1...

Coolant drain
The coolant is drained through the radiator holes and the hollow conical fitting of the cylinder block, on which the drain pipe is put on. When installing the thermostat...

Filling and bleeding the cooling system
1. Check the tightness of the drain plugs and set the air intake control switch to the maximum warm air intake position. 2. Slowly fill coolant up to the mark «Max» on...

Removal and installation of the water pump
Removing 1. Disconnect the wire «masses» from the battery. 2. Drain the coolant. 3. Remove collars and disconnect hoses from a radiator. 4. Remove the thermostat housing...

Removing, installing and adjusting the tension of the alternator drive V-belt
On vehicles with an M 102 engine, the water pump and generator are driven by a V-belt. 1. Disconnect the wire «masses» from the battery. 2. Release nuts of bolts of...

Removal and installation of a multi-ribbed accessory drive belt
Kinematic diagram of the auxiliary drive belt on the engine M 102.982 A - auxiliary drive belt (length 2170 mm) on vehicles without air conditioning; B - auxiliary drive...

Setting and adjusting the belt tension
Installing the multi-ribbed accessory drive belt A - on vehicles without power steering; B - on vehicles with power steering; B - on vehicles with power steering and air...