Audi Workshop Service and Repair Manuals

Cylinder head - exploded view of components

The illustration shows the left cylinder head for “engine generation III” with oil pipes.

1 -	Cylinder head gasket

q	Renewing → Chapter „Removing cylinder head (left-side)“ and → Chapter „Removing cylinder head (right-side)“

q	Installation position: Part No. towards cylinder head

q	If renewed, refill system with fresh coolant

2 -	Cylinder head

q	Removing: left-side → Chapter; right-side → Chapter.

q	Checking for distortion → Fig.

q	Machining limit → Fig.

q	Driving sealing cap into cylinder head → Fig.

q	Installing → Chapter

q	If renewed, refill system with fresh coolant

3 -	Lifting eye

4 -

25 Nm

5 -	Centering pin for intake manifold

6 -	Cylinder head bolt

q

Renew

q	Different bolts → Fig.

q	Note correct sequence when loosening → Anchor and → Anchor

q	Note correct sequence when tightening → Anchor

7 -	Intake manifold gasket

q

Renew

8 -	Intake manifold

q	Removing and installing → Chapter

9 -

10 Nm

q	Tighten in stages and in diagonal sequence

10 -	Filler cap

11 -

Seal

q	Renew if damaged or leaking

12 -	Rubber grommet

13 -	Cover panel for cylinder head cover

14 -

10 Nm

q	Note correct sequence when tightening → Anchor or → Anchor

15 -	Cylinder head cover

q	Removing and installing: left-side → Chapter, right-side → Chapter

16 -	Gaskets for cylinder head cover

q	Renew if damaged or leaking

q	Apply sealant at sealing points before installing → Fig.; Sealant → Parts catalogue

17 -	Combination valve for secondary air system

18 -

10 Nm

19 -

Gasket

q

Renew

20 -

10 Nm

21 -	Coolant pipe (rear)

22 -

O-ring

q

Renew

23 -	Sealing cap

q	Removing and installing → Chapter

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.

Cylinder head machining limit –  Machining of the cylinder head (surface grinding) is only permissible down to the minimum dimension -a-. l  Minimum dimension: -a- = 139.25 mm

Different cylinder head bolts The cylinder head bolts have been gradually converted from a multi-point socket to Polydrive. It is necessary to establish the type of bolt head involved before slackening off or tightening the cylinder head bolts: A -  Multi-point socket head (use socket -3410-) B -  Polydrive head (use special wrench, long reach -T10070-)

Sealing points for bearing caps on cylinder head –  Apply small quantity of sealant to transitions -arrows- at top sealing surface of cylinder head; sealant → Parts catalogue.

Driving sealing cap into cylinder head Replacement cylinder heads without camshafts can be used on both the left and right-side and must be fitted with a sealing cap on the appropriate front side. –  Coat rim of sealing cap with sealant; sealant → Parts catalogue. –  Drive in sealing cap with drift -VW 295- until outer rim of sealing cap is flush with end of chamfer in cylinder head.