Audi Workshop Service and Repair Manuals

Cylinder head - exploded view   Note The diagram shows the cylinder head on cylinder bank 2 (left-side).

1 -	Cylinder head

q	To prevent damage to glow plugs, always place cylinder head on a soft foam surface after removal.

q	Removing: vehicles up to 09.2005 → Chapter; vehicles from 09.2005 onwards → Chapter

q	Checking for distortion → Fig.

q	Cylinder heads must not be machined on diesel engines

q	Installing → Chapter

q	If renewed, change coolant and engine oil

2 -	Toothed belt drive sprocket

q	Use counterhold tool -3036- when loosening and tightening central bolt → Fig.

q	Pulling off: vehicles up to 02.2006 → Fig.; vehicles from 02.2006 onwards → Fig.

3 -

75 Nm

q	Use counterhold tool -3036- when loosening and tightening → Fig.

4 -	Oil seal for toothed belt sprocket for high-pressure pump

q	Renewing → Chapter

5 -

9 Nm

6 -	Bracket for intake connecting pipe

7 -	Coolant pipe

8 -	Banjo bolt, 15.5 Nm

9 -

23 Nm

10 -

Fuel rail

q	Observe rules for cleanliness → Chapter

q	Do not attempt to bend high-pressure pipes to a different shape

q	Tightening high-pressure pipe connections at fuel rails: vehicles up to 09.2005 → Fig.; vehicles from 09.2005 onwards → Fig.

11 -

Seals

q

Renew

12 -	Cylinder head bolt

q

Renew

q	Observe correct sequence when loosening: vehicles up to 09.2005 → Anchor, vehicles from 09.2005 onwards → Anchor

q	Note correct sequence when tightening → Anchor

13 -	Pressure limiting valve, 25 Nm

q	Not applicable to more recent versions

14 -	Lifting eye

15 -	M6: 9 Nm; M8: 23 Nm

16 -	Intermediate pipe (left-side)

q	Removing and installing → Chapter

17 -	30 Nm + 90°

q	Type of connection differs depending on version → Fig.

18 -

Gasket

q

Renew

19 -	Cylinder head gasket

q	Renewing: vehicles up to 09.2005 → Chapter; vehicles from 09.2005 onwards → Chapter

q	Identification → Fig.

q	Installation position: part number must face cylinder head

q	If renewed, change coolant and engine oil

Loosening and tightening central bolt for toothed belt drive sprocket –  Use counterhold tool -3036- when loosening and tightening central bolt -1-.

Pulling off toothed belt drive sprocket (versions up to 02.2006) –  Use puller -3032- to pull off toothed belt drive sprocket.

Pulling off toothed belt drive sprocket (versions from 02.2006 onwards) –  Use puller -T10320- to pull off toothed belt drive sprocket.

Checking cylinder head for distortion –  Use straight edge and feeler gauge to measure for distortion at several points. l  Maximum permissible distortion: 0.1 mm.

Identification of cylinder head gasket 1 -  Holes 2 -  Part number   Note The gaskets for the left and right cylinder heads have different shapes and cannot be interchanged.

Securing intermediate pipe to exhaust manifold A - Exhaust manifold (sheet metal version) l  Fitted with bolts -1- and nuts -2-. l  Renew bolts and nuts. l  Coat with high-temperature paste; for high-temperature paste refer to → Electronic parts catalogue. B - Exhaust manifold (cast version) l  Fitted with bolts -3-. l  Renew bolts. l  Coat with high-temperature paste; for high-temperature paste refer to → Electronic parts catalogue.