A8 Sedan V8-3.7L (AEW) (1997)
- Using two-hole nut turner, e.g. Matra V/159, loosen eccentric tensioning roller and turn to lowest point.
- Compress Camshaft Drive(timing belt)Belt damper by hand and remove tensioning roller.
CAUTION: Mark the running direction of the belt with a felt pen or equivalent. Reversed running direction can lead to damage.
- Remove belt from camshaft sprockets.
- Lightly strike edge of camshaft sprockets with plastic hammer to loosen from tapered ends of camshafts.
- Remove 4 screws fastening vibration damper to drive belt sprocket, remove center bolt, and remove vibration damper.
Do not pull sprocket off crankshaft.
- Remove Camshaft Drive(timing belt)Belt.
Installing and adjusting tension
- Place belt over crankshaft sprocket and install vibration damper on crankshaft.
- By hand, screw in 4 bolts that connect vibration damper to sprocket.
- Lightly oil thread and bolt contact surfaces of center bolt.
- Thread in new center bolt and tighten by hand.
Counterhold with special tool 3197.
Note:
Always replace center bolt.
- Install each camshaft sprocket loosely on taper of camshaft, with mounting bolts remaining loose by approx. 1 turn.
- Place belt in position over all sprockets, guide pulleys and water pump pulley. Belt routing, refer to Camshaft Drive(timing belt)Belt, Assembly
Overview See: Camshaft Drive Belt, Assembly Overview
- Push belt over tensioning roller with eccentric insert and tighten nut (arrow).