Removing and installing toothed belt08.97 ä: Audi 1.8 (ADR, AFY, APT, ARG, …)

AFY APT ARG AVV
Removing

Engine in vehicle
Lock carrier must be in service position => Page
13-1
.

Remove ribbed belt and tensioning element for ribbed belt => Page
13-18
.
Remove viscous fan coupling (with belt pulley) => Fig.
13-17
.

Remove toothed belt guard (top).
Mark direction of rotation of belt with chalk or felt pen.
Set crankshaft to markings for TDC of No. 1 cylinder -arrows- by turning central bolt on crankshaft sprocket in direction of rotation.

Unbolt vibration damper.

Unbolt toothed belt guard (bottom section) -arrows-.

Using 8 mm hexagon key, turn toothed belt tensioning roller -1- slowly and with constant firm pressure in direction of arrow, so that holes -2- in tensioner piston and housing are aligned.
With the tensioner in this position, insert a suitable retaining pin (such as a 2 mm drill bit or nail) into the two holes.
Take off toothed belt.

Note:

Do not loosen bolt -3-.

Installing (adjusting valve timing)

Notes:

The position of the toothed belt must be set as described below, even after repairs in which the belt is only taken off the camshaft sprocket.
The crankshaft must not be at TDC at any cylinder when the camshaft is turned. Otherwise there is a risk of damage to valves and piston crowns.
The setting can be performed with engine cold or engine warm.

Align marking on camshaft sprocket with marking on cylinder head cover.
Place toothed belt on crankshaft sprocket (observe direction of rotation).
Install toothed belt guard - lower part.
Secure vibration damper/belt pulley with one bolt (note fixing arrangement).
Turn crankshaft to TDC No. 1 cylinder.
Place toothed belt on tensioning roller and camshaft sprocket.

Using 8 mm hexagon key, turn toothed belt tensioning roller -1- in direction of arrow until the retaining pin can be pulled out of the tensioner.

Turn crankshaft two full turns in direction of rotation (by turning central bolt on crankshaft sprocket), and check that camshaft and crankshaft marks align with their reference points.
Install vibration damper/belt pulley.
Install toothed belt guard (top section).
Install ribbed belt and ribbed belt tensioning element=>Page
13-20
.

Tightening torques

Component · Nm
Toothed belt guard (bottom) to cylinder block · / M6 · / 10
M8 · 20
Vibration damper/belt pulley to / crankshaft · / 40 1)
Ribbed belt tensioner to bracket · 25

1)
Bolt strength rating 10.9