Toothed belt drive — AUDI

AHF ALH ASV
Note:

Mark the running direction with chalk or felt pen before removing the toothed belt. If the belt runs in the opposite direction when it is refitted, this can cause breakage.

120 Nm + 1/4 turn (90°) further
Replace
Do not oil
To loosen and tighten use counterhold 3415
=> Fig.
13-18

40 Nm + 1/4 turn (90°) further
Replace

15 Nm

22 Nm
Only vehicles as of 10.97

Toothed belt guard - lower
10 Nm
Toothed belt guard - centre
45 Nm
Observe tightening sequence =>Fig.
13-18

Engine support
Install => Fig.
13-18

Toothed belt guard - top
For removal remove right air duct pipe
When installing, engage carefully in centre toothed belt guard.

Toothed belts
Mark running direction with chalk or felt pen before removing
Check for wear
Removing => Page
13-23
Install (adjust valve timing) => Page
13-31
.

Idler roller
Only vehicles as of 10.97

Bolt
Different versions
Tightening torque => Fig.
13-21

20 Nm
20 Nm

45 Nm
Hold using counterhold 3036 for loosening and tightening camshaft sprocket

Camshaft sprocket
Pull off using special tool T40001 => Fig.
13-19

Semi-automatic toothed belt tensioning roller
Checking => Page
13-40
Installation position => Fig.
13-19

Idler roller
Injection pump sprocket
Two-piece
Different versions. Allocation of bolts -Item
13-21
Removing and installing => Fig.
13-20

30 Nm
Toothed belt guard - rear
Engage in front at lower edge behind sealing flange.

Coolant pump
Removing and installing=>Page
19-12

Idler roller
Unscrew to remove coolant pump

Crankshaft sprocket
Contact surface between sprocket and crankshaft must be free of oil
Can only be installed in one position

Threaded bushing
Injection pump
Never loosen central nut
Removing and installing

=> Diesel Direct Injection and Glow Plug System (4-cyl. TDI) > 07.99; Repair group 23
Diesel Direct Injection and Glow Plug System (4-cyl. TDI) > 07.99

=> TDI Injection and Glow Plug System (4-cyl.) 08.99 >; Repair group 23
TDI Injection and Glow Plug System (4-cyl.) 08.99 >

Bracket for auxiliary mechanical units
45 Nm

Fig.1
Removing and installing crankshaft sprocket

Use counter-hold tool 3415 to loosen and tighten the central bolt.

Fig.2
Installing engine support

Insert bolts -1 ... 3- hand-tight initially.
Then tighten the bolts -1 ... 3- to 45 Nm.

Fig.3
Pull camshaft sprocket off camshaft

Toothed belt removed => Page
13-23

Unscrew the camshaft sprocket bolt one half turn .
Place the two-arm puller T40001 with claw T40001/2 -Item A- and the two-arm claw T40001/3 -Item B- centralised onto the camshaft sprocket.
Pull off the camshaft sprocket using the two-arm puller. Counterhold using an open-end spanner -C- in the process.

Fig.4
Fitting location of semi-automatic tensioning roller

Retaining lug -arrow- must engage in rear toothed belt guard slot.

Fig.5
Removing and installing injection pump sprocket

Important
To remove the injection pump sprocket, unscrew only the bolts -1-.
Never loosen the injection pump sprocket central nut -2-. Otherwise the injection pump basic setting is incorrectly adjusted and cannot be corrected again using workshop equipment.

When installing the injection pump sprocket, note the different securing bolts -1- => Fig.
13-21
.

Fig.6
Different securing bolts for injection pump sprocket

A - Version with tip and punch mark -arrows-:

Use only for injection pump sprocket with part-No. 038 130 111 A
Tightening torque: 20 Nm + 90° (1/4 turn)
Replace bolt after each loosening operation

B - Version without tip and punch mark:

Use only for injection pump sprocket with part-No. 038 130 111 B
Tightening torque: 25 Nm
Bolt may be re-used