SEAT Workshop Service and Repair Manuals

Servicing valve gear: servicing

1 -	Tighten to 20 Nm + continue tightening 1/4 turn (90°)

q

Renew

q	Use camshaft locking tool -T10016- to loosen and tighten → Fig.

2 -	Camshaft sprocket

q	Note position when installing the toothed belt → Chapter

3 -	Sealing ring

q	Only replace with camshaft installed

q	Lightly oil sealing lip of oil seal

q	Renew → Chapter

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	Removal and installation → 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 -	Tighten to 10 Nm + continue tightening 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 bearings for ease of movement

q	Oil contact surface

q	Use securing clip to clip onto support element when installing

10 -	Valve cotters

11 -	Sealing 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	Check oil spray drillings

q	With hydraulic valve clearance compensation

q	Do not interchange

q	Before installing check camshaft axial clearance → Fig.

q	Oil contact surface

16 -	Valve spring plate

17 -	Valve spring

q	Removing and installing: Cylinder head Cylinder head removed: with -T20034/1- installed: → 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	Rework valve seats → Chapter

q	Reworking the sealing surface → Fig.

23 -

20 Nm

24 -	Coupling drive tensioning roller

q	Checking → Chapter

q	Tensioning toothed belt → Chapter

25 -	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

26 -

Camshafts

q	Checking axial clearance → Fig.

q	Coat with oil before inserting (also axle bearing shoulder)

q	Identification and valve timing → Fig.

q	After installing, replace seals → Chapter

27 -

O-ring

q

Renew

q	Coat with oil before inserting

Locking both camshaft sprockets with camshaft locking tool -T10016- Work sequence –  Guide both locking pins through camshaft sprocket locking pin holes onto stop in camshaft housing fitting holes.   Note! Both locking pins are inserted correctly when the ends -D- align with line -A-. –  Slide retainer -B- onto stop on inlet camshaft sprocket -C-. –  When both camshaft sprockets are locked in the fitting holes the camshaft pulleys can be loosened or tightened.

Reworking cylinder head sealing surface Cylinder head reworking dimension: a = At least 108.25 mm

Camshaft: Checking axial clearance Special tools and workshop equipment required t  Universal dial gauge bracket -T20020- t  Dial gauge Test sequence 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	Cyl. 3
Inlet shaft E	“036AF”	“DE”
Exhaust shaft A	“036AG”	“W1”

Valve timing at 1 mm valve lift

Intake opens after TDS	15.5°
Intake closes after PMI	29.5°
Outlet closes before PMI	24.0°
Outlet closes before TDS	10.0°

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

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