A4 Quattro Wagon L4-1.8L Turbo (AEB) (1999)
Timing Belt: Adjustments
Adjust valve timing
Note:
Use the following procedure to adjust toothed belt, even for repairs that only require removal of toothed belt from camshaft gear.
Adjustments can be made on a hot or cold engine.
CAUTION: When turning camshaft, crankshaft may not be at TDC for any cylinder. Valves and/or piston heads maybe damaged.
Align marking on camshaft gear to marking on cylinder head cover.
GPlace toothed belt on crankshaft gear noting direction of rotation.
Install lower toothed belt cover.
Using a bolt, secure vibration damper/belt pulley (note locating point).
Set crankshaft to TDC Cyl. 1 position.
Place toothed belt on belt tensioner and camshaft gear.
Tighten toothed belt by turning tensioner -A- to right using 2 pin spanner (i.e. Matra V159 pin wrench) until cylinder -1- is fully extended and
tensioner -2- is raised by approximately 1 mm.
Tighten mounting bolt -3- hand tight.
Turn crankshaft 2 rotations in running direction.
Check area -A- for proper alignment with the upper edge of piston -2- (Fig. A13-0012) and adjust if necessary.
Area -A-: adjustment OK
Area -B-: wear limit
Area -C-: re-adjust and check belt drive including tensioner for wear
Note:
If edge of piston is located in area -A-, measurement -D- is between 25 - 29 mm (0.984 - 1.142 in).
