SEAT Workshop Service and Repair Manuals

Servicing valve gear repairing

1 -	20 Nm + 1/4 turn. (90°)

q

Renew

q	Counter-hold with -T10016- to loosen and tighten → Fig.

2 -	Camshaft sprocket

q	Note position when installing the toothed belt → Chapter

3 -

Oil seal

q	Lightly oil sealing lip of oil seal

q	Renew → Chapter

q	Only replace with camshaft installed

4 -	Coupling drive toothed belt

q	Mark direction of rotation before removing

q	Check for wear

q	Do not kink

q	Removing, installing and tensioning → Chapter

5 -	Camshaft housing

q	Removing and installing → Chapter

q	Remove remnants of old sealant

q	Before installing, lubricate with D 188 003 A1

q	When installing fit vertically from above onto studs and dowel pins

6 -	10 Nm + 1/4 turn (90°)

q

Renew

q	Tighten from centre outwards

7 -	Sealing cap/ignition transformer retainer

8 -

10 Nm

9 -	Roller rocker finger

q	Check bearing for ease of movement

q	Oil contact surface

q	Use securing clip to clip onto support element when installing

10 -	Valve cotters

11 -

Cap

12 -

20 Nm

13 -	Lifting eye

14 -	Non-return valve, 6 Nm

q	Insert with D 154 102 A1

q	Do not overtighten, otherwise the valve can stick

15 -	Support element

q	Do not interchange

q	Check oil spray drillings

q	With hydraulic valve clearance compensation

q	Oil contact surface

q	Before installing check camshaft axial clearance → Fig.

16 -	Valve spring plate

17 -	Valve spring

q	Removing and installing:

Cylinder head removed: with -T20034B/1-

Cylinder head fitted → Chapter renewing valve stem seals

18 -	Valve stem seal

q	Renew → Chapter

19 -	Service part - valve guide

q	With collar

20 -	Valve guide

q	Checking → Chapter

q	Renew → Chapter

21 -

Valves

q	Do not rework, only grinding is permitted

q	Valve dimensions → Fig.

22 -	Cylinder head

q	Reworking of the sealing surfaces on the camshaft side is not permitted

q	Reworking valve seats → Chapter

q	Rework the sealing surface → Fig.

23 -

20 Nm

24 -

Tensioner

q	Checking → Anchor

q	Tensioning toothed belt → Chapter

25 -

Support

26 -	Sealing plug, 45 Nm

q	Insert with D 154 102 A1

q	Must not be screwed in too far

q	Maximum permitted insertion depth from top of plug to camshaft housing surface: 2 mm

27 -

Camshafts

q	Checking axial clearance → Fig.

q	Identification and valve timing → Fig.

q	Coat with oil before inserting

q	After installing, replace seals → Chapter

28 -

O-ring

q

Renew

q	Coat with oil before inserting

Lock camshaft sprockets with canshaft locking tool -T10016- –  Insert the locking pins -T10016- into the locking holes of the camshaft sprockets and the holes in the camshaft housing.   Note! Both locking pins are correctly placed if the end parts -D- are aligned with the line -A-. –  Slide support -T10016--B- onto stop on inlet camshaft sprocket -C-. –  Once both sprockets are locked, you can proceed removing or tightening the camshaft sprockets.

Reworking cylinder head sealing surface Cylinder head reworking dimension:    a = at least 108.25 mm   Note! When the sealing surface is reworked, the valves must be lowered in the same measure (rework the valve seat rings) otherwise the valves could hit the pistons. Check that it is not below the minimum acceptable dimension → Chapter

Camshafts: checking axial clearance Special tools and workshop equipment required t  Universal dial gauge bracket -T20020- t  Dial gauge Perform measurements with camshaft housing removed and sealing cover fitted. Wear limit: max. 0.40 mm

Camshaft identification, valve timing Identification

Identification between cam pairs
	Cyl. 1 and 2
Inlet shaft -E-	36AC
Exhaust shaft -A-	36AA

Valve timing at 1 mm valve lift

Inlet opening after TDC	19.1°
Inlet closing after TDC	15.1°
Exhaust opening before TDC	20.2°
Exhaust closing before TDC	15.3°

Valve dimensions   Note! Valves must not be reworked. Only lapping-in is permitted.

Dim.	Inlet valve	Exhaust valve
Ø at mm	29.5	26.0
Ø b mm	5.973	5.953
c mm	100.9	100.5
α ∠°	45	45