SEAT Workshop Service and Repair Manuals

Valve gear - assembly overview t  Seal contact surfaces of bearing caps 1 and 5 → Fig. t  Valve dimensions → Fig. t  Valve stem seals: replacement with the cylinder head removed → Fig.

1 -	20 Nm + 90° (1/4 turn)

q

Replace.

q	Respect the loosening and tightening sequence → Chapter

2 -	Rocker axle

q	Do not mix them up

q	Removing and fitting → Chapter.

q	Before fitting, check if all of spherical head pins and the O-rings are fitted on the injector pump units → Fig.

3 -	Cylinder head bolt

q

Replace.

q	Respect the loosening and tightening sequence → Chapter

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

4 -

Glass

q	For cylinder head bolts

q	Insert in cylinder head before fitting bearing caps

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	Checking axial clearance of camshaft before fitting → Chapter

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 → Fig.

q	Removing and fitting: When cylinder head is installed → Chapter

9 -	Interior valve spring

q	Removing and fitting: When cylinder head is installed → Chapter

10 -	Valve stem seal

q	replace when cylinder head is installed → Chapter

q	Replace with cylinder head removed → Fig.

11 -	Valve guide

q	check → Chapter

12 -	Injectors-pump:

q	Removing and installing → Chapter

13 -	Cylinder head

q	Removing and fitting → Chapter

14 -

Oil seal

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

q	Before fitting, use clean cloth to wipe off oil residue at camshaft journal.

q	To install, tape over (e.g. using Sellotape) groove in taper of camshaft

q	Replacement → Chapter

15 -

Valves:

q	Valve dimensions → Fig.

16 -	Bearing shell

q	Do not interchange used bearing shells (mark).

q	Ensure that the cylinder head and the retaining lugs sit correctly on the bearing caps

17 -

Camshaft:

q	Checking axial clearance → Chapter

q	Removing and fitting → Chapter

q	Check radial clearance with Plastigage; Wear limit: 0.11 mm

q	out-of-true: max. 0.01 mm

18 -	Bearing cover

q	Fitting order → Chapter

q	For fitting, seal the bearing cap contact surfaces 1 and 5 using AMV 174 004 01 → ETKA (Electronic parts catalogue) → Fig.

Caution Before fitting, check that the washers are in place. → Item

19 -	8 Nm + 90° (1/4 turn)

q

Replace.

Seal contact surfaces of bearing caps 1 and 5 with sealant -AMV 174 004 01- –  Apply sealant AMV 174 004 01 → ETKA (Electronic parts catalogue) thinly and evenly on surfaces -1- .   Note Be careful that no sealant gets into the grooves -arrows-.

Spherical headed bolts for rocker arm shaft –  Before fitting the rocker lever shaft, check if the spherical head pins -1- and O-rings -2- are in the injector pump units

Valve dimensions   Note The intake and exhaust valves should not be refaced or reworked. They may only be grinded.

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

Valve stem seals: replacement with the cylinder head removed –  With the cylinder head removed secure the retention tool -T20034/2- as shown in the illustration, and for removal of the valve spring, use the pressure tool -T20034/D- with the adapter -T20034/34-.