SEAT Workshop Service and Repair Manuals

Notes:

• ◆ Cylinder heads which have cracks between the valve seats or between valve seat inserts and the spark plug thread can be used further without reducing service life, provided the cracks do not exceed a maximum of 0.3 mm in width, or when no more than the first four spark plug threads are cracked.
• ◆ After installing new bucket tappets the engine must not be started for approx. 30 minutes (otherwise valves will strike pistons), then turn crankshaft two rotations.

• 100 Nm
• ◆ Use counter-hold tool 3415 to loosen and tighten
• Camshaft sprocket
• ◆ With rotor for Hall sender
• Oil seal
• ◆ Renew
• Woodruff key
• ◆ Ensure tight fit
• 20 Nm
• Bearing cap
• ◆ Installation position => Fig. 3
• ◆ Installation sequence
  => Page 15-39, removing and installing camshaft
• ◆ Coat contact surfaces of bearing cap 1 lightly with sealant AMV 174 004 01

• Camshaft
• ◆ Checking axial clearance => Fig. 2
• ◆ Removing and installing
  => Page 15-39
• ◆ Checking radial clearance with plastigage
  Wear limit: 0.1 mm
• ◆ Run-out: max. 0.01 mm
• Bucket tappet
• ◆ Do not interchange
• ◆ With hydraulic valve clearance compensation
• ◆ Checking => Page 15-43
• ◆ Store with cam lobe contact surface downwards
• ◆ Before installing check camshaft axial clearance => Fig. 2
• ◆ Oil contact surface
• Cotters

• Upper valve spring plate
• Valve spring
• ◆ Removing and installing:
  Cylinder head
  removed: with 2037
  installed: => Page 15-48, renewing valve stem seals
• Valve stem seal
• ◆ Renewing=> Page 15-48
• Valve guide
• ◆ Checking => Page 15-45
• ◆ Renewing => Page 15-46
• ◆ Service version with collar
• Cylinder head
• ◆ Reworking valve seats
  => Page 15-32
• Valves
• ◆ Do not rework only grinding-in is permitted
• ◆ Valve dimensions => Fig. 4

→ Fig. 1    Reworking cylinder head sealing surface

Cylinder head reworking dimension:
    a = At least 132.8 mm

Note:

When the sealing surface has been reworked, the valves must be set deeper by the same amount.

→ Fig. 2    Checking camshaft axial clearance

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Universal dial gauge bracket VW 387
• ◆ Dial gauge

Check with bucket tappets removed and with first and last bearing caps fitted.

Wear limit: max. 0.15 mm

→ Fig. 3    Fitting position of camshaft bearing caps

Note offset. Before installing camshaft fit bearing caps and determine fitting position.

→ Fig. 4    Valve dimensions

Note:

Valves must not be reworked. Only lapping-in is permitted.