Volkswagen Workshop Service and Repair Manuals

(Adjusting valve timing)

• ◆ Crankshaft not at TDC.

• ‒ Position toothed belt on crankshaft and intermediate shaft sprockets.
• ‒ Secure crankshaft V belt pulley with 1 screw (not position).
• ‒ → Mark on camshaft sprocket must be in alignment with cylinder head cover -arrow-.

Version B

• ‒ Mark on camshaft sprocket must be in alignment with arrow on toothed belt guard.

• ‒ → Align marks on pulley and intermediate shaft sprocket (TDC cylinder no. 1).
• ‒ Place toothed belt on camshaft sprocket.

• ‒ → Tension toothed belt by turning the tensioning roller in direction of arrow with a nut turner (e.g. Matra V159) or spanner.
  It should just be possible to turn the toothed belt through 90° with thumb and forefinger at a point midway between the camshaft and intermediate shaft sprockets.
• ‒ Tighten nut on tensioning roller.
       Tightening torque: 45 Nm
• ‒ Turn crankshaft twice and check adjustment.
• ‒ Remove V belt pulley for crankshaft
• ‒ Install bottom part of toothed belt guard.
• ‒ Install V belt pulley.
• ‒ Check and, if necessary, adjust ignition timing

=> Repair Group 28; Ignition system

Note:

Adjust the toothed belt as described below in the case of repairs which only require the removal of the toothed belt from the camshaft sprocket.

Version A

• ‒ → Align mark on camshaft sprocket with cylinder head cover - arrow-.

Version B

• ‒ Align mark on camshaft sprocket with arrow on toothed belt guard.

Note:

Before turning the camshaft make sure that the pistons are not at TDC. Valves and piston crowns could be damaged.

• ‒ Place toothed belt in position and tension.
• ‒ → Check whether distributor rotor points towards the mark for cylinder no. 1 on the distributor housing. If not, turn the distributor until the marks are aligned or install a new distributor.
• ‒ Turn camshaft twice and check whether camshaft and crankshaft marks are aligned with their reference points.
• ‒ Check and, if necessary, adjust ignition timing

=> Repair Group 28; Ignition system