SEAT Workshop Service and Repair Manuals

Components overview

1 -

65 Nm

q	Use counterhold -T20018B- to loosen and tighten

2 -	Camshaft wheels

q	For exhaust camshaft

q	Note fitting position: the thin core of the camshaft sprocket points outwards and TDC mark of the cylinder can be seen. 1

3 -	Exhaust camshaft seal

q	Replace → Chapter

4 -	Cylinder head

q	removing and fitting → Chapter

q	Reworking valve seats → Chapter

q	Reworking sealing surface → Fig.

q	Sealing transitions → Fig. and → Fig.

q	Dowel sleeves for bearing caps must be positioned in cylinder head

5 -	Valve guide

q	Testing → Chapter

6 -	Valve stem seal

q	Replace → Chapter

7 -	Valve spring

q	Removing and fitting: cylinder head removed with the gasket tool -T20034/1-, cylinder head fitted → Chapter

8 -	Valve plate spring

9 -

Semicones

10 -	Hydraulic tappet

q	Do not mix them up

q	With hydraulic valve clearance compensation.

q	Testing → Chapter

q	Place with contact surface downwards

q	Before installing, check camshaft axial clearance → Fig.

q	Oil contact surface

11 -	Supply camshaft

q	Check axial clearance → Fig.

q	Removing and installing → Chapter

q	Check radial clearance with Plastigage, wear limit: 0.1 mm

q	Off centre: max. 0.01 mm

12 -	Bearing cap, inlet camshaft

q	Position and installation sequence → Chapter

q	Must be housed in the dowel sleeves for adjusting

13 -	Double bearing cap

q	Spread contact surface with sealant → Parts catalogue

q	Must be housed in the dowel sleeves for adjusting

q	Sealing transitions → Fig. and → Fig.

14 -	Exhaust camshaft

q	Check axial clearance → Fig.

q	Removing and fitting → Chapter

q	Check radial clearance with Plastigage, wear limit: 0.1 mm

q	Off centre: max. 0.01 mm

15 -	Bearing cap, exhaust camshaft

q	Position and installation sequence → Chapter

q	Must be housed in the dowel sleeves for adjusting

16 -

10 Nm

17 -

10 Nm

18 -	Drive chain

q	Mark D.O.R. before removing → Chapter

q	Check for wear

19 -

10 Nm

20 -

O-ring

q

Replace

21 -	Valve -1- for variable distribution -N205-

q	Testing → Chapter

22 -

3 Nm

23 -	Chain tensioner

q	Before disassembly, attach it firmly with the counterhold -T20044- → Chapter

q	Seal transition areas between hydraulic chain tensioner and cylinder head → Fig.

24 -	Rubber-metal gasket

q

Replace

25 -

Gasket

q

Replace

26 -	Exhaust valves

q	With sodium filling

q	Observe disposal regulations for valves with sodium filling → Fig.

q	Not to be reworked; only grinding-in permissible

q	Valve dimensions → Fig.

27 -	Supply valves

q	Not to be reworked; only grinding-in permissible

q	Valve dimensions → Fig.

28 -

Oil seal

q	Lightly lubricate the sealing lip of the oil seal

q	Replace → Chapter

29 -

Shutter

q	For Hall sender

q	Note location when installing

30 -

Washer

q

Conical

31 -

25 Nm

32 -	Hall sender -G40-/Hall sender 2 -G163-

q	Testing → Chapter

33 -

10 Nm

Cylinder head sealing surface: reworking The dimension for reworking is measured through the holes for the cylinder head bolts a = minimum 139.2 mm.

Camshaft: checking axial clearance Special tools and workshop equipment required t  Support -T20020- t  Dial gauge Check with bucket tappets and chain removed and -2-and -4- bearing caps fitted. Wear limit: max. 0.2 mm.

Valve dimensions   Note Valves are not to be reworked. Only grinding-in is permitted.

Dim.		Inlet valve	Outlet valve
Ø a	mm	26,9	26,9
Ø b	mm	5,963	5,963
c	mm	104,84 ... 105,34	103,64 ... 104,14
α	∠°	45	45

Note Sodium filled outlet valves must be properly prepared before scrapping. They must be cut through in the centre of the stem with a hacksaw. Avoid all contact with water. The prepared valves must be cast into a bucket of water (10 at a time). Keep the bucket at a safe distance, as a strong chemical reaction is produced in which the sodium burns off. Parts thus treated may be scrapped.

Sealing bearing cap/cylinder head joints –  Carefully apply a thin coat of sealant → Parts Catalogueto both edges of sealing surfaces between double bearing cap and cylinder head -arrows- using a small screwdriver.

Seal transisitions between hydraulic chain tensioner and cylinder head –  Carefully apply a thin coat of sealant → Parts Catalogueto both edges of sealing surfaces between chain tensioner and cylinder head -arrows- using a small screwdriver.