Audi TT (2007 year). Manual — part 23

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

– Fit conrod bearing caps and tighten to 30 Nm without rotating

crankshaft.

– Remove conrod bearing cap again.
– Compare width of Plastigage with measurement scale.
Radial clearance:
• Wear limit: 0.08 mm.
– Renew conrod bolts.

4. Pistons and conrods

83

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

15 – Cylinder head, valve gear

1

Toothed belt drive

1.1

Toothed belt - exploded view

1 - Toothed belt

❑ Before removing, mark

direction of rotation with

chalk or felt-tip pen

❑ Check for wear
❑ Removing

⇒ page 86

❑ Installing (adjusting

valve timing)

⇒ page 91

2 - Idler roller
3 - Nut

❑ 20 Nm

4 - Tensioning roller
5 - Nut

❑ 20 Nm + 45°

6 - Bolt

❑ 20 Nm

7 - Idler roller
8 - Bolt

❑ 20 Nm + 45°
❑ Renew

9 - Camshaft sprocket
10 - Bolt

❑ Slacken and tighten with

counterhold tool -

T10051-

❑ 100 Nm

11 - Camshaft hub

❑ Removing and installing

⇒ “3.5 Removing and installing camshafts”, page 121

12 - Plug
13 - Cover (rear) for toothed belt
14 - Bolt

❑ 10 Nm

15 - High-pressure pump hub

16 - Nut

84

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

17 - High-pressure pump sprocket
18 - Bolt

19 - Idler roller
20 - Bolt

❑ Renew
❑ 50 Nm + 90°

21 - O-ring

❑ Renew

22 - Coolant pump

❑ Removing and installing

⇒ page 170

23 - Bolt

❑ Tightening torque

⇒ Item 1 (page 170)

24 - Crankshaft sprocket

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

25 - Bolt

❑ Renew
❑ Slacken and tighten with counterhold tool -3415-
❑ Do not additionally oil threads and shoulder
❑ 120 Nm + 90°

Cover for toothed belt (bottom and centre) - tightening torque
– Tighten bolts -arrows- to 9 Nm.

1. Toothed belt drive

85

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

1.2

Removing and installing toothed belt

Special tools and workshop

equipment required
♦ 2x Diesel injection pump

locking pin -3359-

♦ Crankshaft stop -T10050-
♦ Counterhold tool -T10172-
♦ Special wrench, long reach

-T10264-

♦ Locking tool -T10265-
♦ Bit XZN 10 -T10385-

Removing
– Remove engine cover panel -arrows-.

86