SEAT Workshop Service and Repair Manuals

Cylinder head, camshaft: assembly overview t  Seal contact surfaces of bearing caps 1 and 5 → Fig. t  Valve dimensions, → Fig. t  Identification of the camshaft distribution timing → Fig. t  Distribution time for 1 mm run of the valve → Anchor

1 -	20 Nm + 90° (1/4 turn)

q

8x

q

replace

q	Respect the loosening and tightening sequence → Chapter

2 -	Rocker axle

q

2x

q	Do not mix them up

3 -	Cylinder head bolt

q

10 pieces

q

replace

q	Respect the loosening and tightening sequence → Chapter

q	Prior to installation, insert washers → Item in cylinder head

4 -

Washer

q	For cylinder head bolts

q	Before fitting the bearing caps, fit them in the cylinder head

5 -	Hydraulic followers:

q	Do not mix them up

q	With hydraulic valve clearance compensation.

q	Set down with cam bearing surface facing downwards.

q	Oil contact surface

q	Before separation, extract the half bearings from the camshaft

6 -	Woodruff keys

7 -	Valve plate spring

8 -	Exterior valve spring

q	Removing and fitting: with cylinder head removed using the pressure tool -T20034/1-, with cylinder head installed → Chapter

9 -	Interior valve spring

q	Removing and fitting: with cylinder head removed using the pressure tool -T20034/1-, with cylinder head installed → Chapter

10 -	Valve stem seal

q	Renew → Chapter

11 -	Valve guide

q	check → Chapter

q	If the wear limit is still exceeded, replace the cylinder head

12 -	Injector-pump:

q	removing and fitting → Chapter

13 -	Cylinder head

q	Note the identification → Chapter

14 -

Seal

q	Do not grease or oil the seal lip of the seal

q	Before fitting, clean the remains of oil on the crankshaft journal using a clean cloth.

q	For fitting, cover the camshaft cone groove (for ex. With cellophane)

q	removing and fitting → Chapter

15 -

Valves:

q	Valve dimensions, → Fig.

16 -	Half-bearing

q	Do not interchange used bearing shells (mark).

q	Ensure the correct seating in the allotment

17 -

Camshaft:

q	removing and fitting → Chapter

q	Check the radial play using a Plastigage:

q	Wear limit: 0.11 mm

q	out-of-true: max. 0.04 mm

q	Identification and distribution time → Fig.

18 -	Bearing caps

q	Fitting order → Chapter

q	Seal contact surfaces of bearing caps 1 and 5 → Parts Catalogue → Fig.

19 -	8 Nm + 90° (1/4 turn)

q

10 pieces

q

replace

Special tools and workshop equipment required

t  Socket -T20020-, see equivalent → Anchor t  Dial gauge –  Carry out the measurement of the cup cam followers removed and with the second, third and last bearing caps fitted. Wear limit: max. 0.15 mm

Seal contact surfaces of bearing caps 1 and 5 –  Apply sealant → Parts Catalogue uniformly and thinly over the surfaces -1-.   Note Ensure that the sealant does not enter in the grooves -arrows-.

Valve dimensions   Note The valves can not be reworked. Only lapping-in is permitted.

Dim.		Inlet valve	Outlet valve
Ø a	mm	35,95	31,45
Ø b	mm	6,980	6,956
c	mm	89,95	89,95
α	∠°	45	45

Identification of the camshaft distribution timing Identification t  Base diameter of the cams: a = Ø 52.8 mm t  Identification using numbers and letters stamped on the frontal surface of the cam for the exhaust valve on the fourth cylinder.

Cylinder 4 -arrow-

038 R or 858 R

Distribution time for 1 mm run of the valve

Inlet opens at TDC	15,8°
Inlet closed at BDC	25,3°
Exhaust opens before BDC	28,2°
Exhaust closes before TDC	18,7°