Timing Belt: Service and Repair
REPLACING DRIVE BELTImportant! Always replace an used drive belt regardless of the driven miles, with a new one each time the tensioning roller is loosened.
Unscrew distributor cap (1).
Unscrew distributor rotor (2).
Older Version:
Unscrew adapter (8).
Remove cover (3).
Unscrew bolts (4).
Installation:
Check seal (9), replacing if necessary.
Take off rubber guard (5).
Unscrew nut (6).
Remove cover (7).
Re-install adapter (8).
Turn crankshaft to have TDC in cylinder no. 1 (arrow on camshaft sprocket facing mark on cylinder head).
Remove vibration damper. Service and Repair
Two Piece Hub/Sprocket.
Remove hub for vibration damper. Service and Repair
Swing away tensioning bar (7).
Lift out TDC sender (8).
Unscrew bolt (9) and take off cover.
Loosen bolts (7 and 8).
Press in tensioning roller,
Tighten bolt (8).
Take off drive belt.
Installation:
There are different drive belt versions.
1. For sprockets with square profile..
A. Square profile with 111 teeth
B. Square profile with 110 teeth ("Z 127") with modified woodruff key and tensioning roller marked "Z 127"
2. For sprockets with oval profile
A. Oval profile with 128 teeth
B. Oval profile with 127 teeth ("Z 127") and tensioning roller marked "Z 127".
Versions A must be converted to B
Install toothed drive belt in opposite direction of engine rotation, starting on the crankshaft sprocket
Tightening Drive Belt:
- Loosen bolt (8) again (spring force must move the tensioning roller).
- Crank engine once in running direction up to the TDC mark (drive belt tightens itself).
- Check timing (mark on camshaft sprocket must be precisely aligned with mark on cylinder head with crankshaft turned to TDC).
- Bolt down tensioner (tighten bolt (8) first and then bolt (7)).
Install a label with the date and mileage on the cylinder head cover after completion of work