Distributor: Service and Repair

Ignition distributor, removing/installing

NOTE: For injection timing and knock regulation, the Motronic Engine Control Module (J220) needs the TDC cylinder 1 signal from the Camshaft Position Sensor (G40).

TDC cylinder 1, checking

Engine installed:






- Move flywheel (-A-) or drive plate (-B-) to cylinder 1 TDC marking -arrows-.

Engine removed:






- Set vibration damper to cylinder 1 TDC marking -arrow-.






- Marking on camshaft drive belt sprocket must line up with marking on toothed belt cover.






- Rotor must line up with mark on distributor housing or notch in rim of Camshaft Position Sensor dust cover.

Removing

Crankshaft and camshaft in cylinder 1 TDC position

- Remove distributor.

Installing






- Before installing ignition distributor, position slot on oil pump shaft parallel to crankshaft.






- Install Ignition Distributor.
To remove, hold distributor rotor as shown.
Pins on Ignition Distributor must point toward hold for mounting screw -arrow-.






- With the Ignition Distributor installed, marking on housing must line up with marking on distributor rotor or with notch on rim of dust cover for Camshaft Position Sensor.
- Tighten mounting screw for Ignition Distributor.
Tightening torque: 25 Nm (18 ft lb).

If markings do not match:

- Loosen belt tensioner and remove drive belt from camshaft sprocket.






- Turn intermediate shaft sprocket with drive belt in direction of arrows until marking on distributor rotor lines up with marking for cylinder 1 on distributor housing (drive belt slips over crankshaft drive belt sprocket).






- Marking on Ignition Distributor must line up with marking on distributor rotor or with notch on rim of dust cover for Camshaft Position Sensor.
- Position drive belt on pulley and camshaft drive belt sprocket.

NOTE: For easier installation of drive belt, only tighten belt tensioner nut approx. one turn.






- Tighten drive belt by turning belt tensioner in direction of arrow with V159 spanner.
- Drive belt is correctly tensioned if it can be twisted 90° with thumb and forefinger halfway between camshaft and intermediate shaft sprockets.
- Tighten nut on belt tensioner.
Tightening torque: 45 Nm (33 ft lb).

- Rotate crankshaft two full revolutions and re-check adjustment.
- Check markings on Ignition Distributor and rotor.
- Install upper part of belt guard.
- Clean Ignition Distributor cap and check for cracks before installing.