Valve Guide Seal: Service and Repair

Valve stem seals, replacing

^ Cylinder head installed

Removing

- Remove camshafts.
- Remove the hydraulic lifters and put them down with the contact surface downward. When doing this ensure that the valve lifters are not interchanged.
- Remove spark plugs with spark plug spanner 3122B.
- Set piston of appropriate cylinder to "bottom dead center".
- Screw pressure hose VW 653/3 into the spark plug thread.





The intake and exhaust valves are installed at different angles in the cylinder head. Valve spring compressor 3362 can be set accordingly to two different positions:

1 - upper position for center intake valve

2 - lower position for the two outer intake valves and the two exhaust valves

3 - Threaded holes on each side to take two M6 x 25 bolts for securing spring compressor to cylinder head





- Mount fitting tool 3362 on cylinder head with fitting tool securing bolts.

Note:
To install assembly tool 2036 on the exhaust side the studs at the back of the exhaust side have to be removed.

- Set the correct position for the valve concerned.
- Connect pressure hose to compressed air supply.

^ Air pressure: at least 6 bar

- Press valve springs down with threaded spindle and thrust piece 3362/1 and remove.

Note:
Tight cotters can be loosened by tapping lightly on the valve spring plate.





- Pull off valve stem seals with extractor 3364.

Installing





- To prevent damage to the new valve stem seals, place plastic sleeve -A- on valve stem.
- Lightly oil sealing lip of valve stem seal.
- Place valve stem seal -B- in the tool 3365 and push carefully onto the valve guide.

Note:
When replacing intake and exhaust valves lightly oil valve stems before installing.

- Install camshafts.

Note:
^ After installing camshafts wait for approx. 30 minutes before starting engine. Hydraulic valve compensation elements have to settle (otherwise valves will strike pistons).
^ After working on the valve gear, turn the engine carefully at least 2 rotations to ensure that none of the valves make contact when the starter is operated.