Valve Guide: Service and Repair

Valve guides, replacing
Special tools and equipment
^ Drift 3360 and Support 3361
^ Hand reamer 3363 and cutting fluid
^ Press tool VW 411

Removing
- Check whether valve seat insert rings and, if necessary, cylinder head sealing surface can be reworked.
If NO, do not replace valve guides





Set the support as follows:
- Install mounting pins for cylinder head bolt holes -A- into threaded hole positions 2 and 3.
- Install pin -B- into relevant hole for valve angle.
Outer intake valves: 21.5°
Center intake valve: 15°
Exhaust valve: 20°





- Press worn valve guides out with drift 3360 from camshaft side.

Installing

Note: When the shoulder on the guide makes contact, the pressure must not exceed 10 kN (approx. 1.0 ton) otherwise shoulder may break off.

- Coat new valve guides with oil and press with drift 3360 into cold cylinder head from camshaft side until shoulder makes contact.
- Ream guides out with hand reamer 3363 using plenty of cutting fluid.
- Rework valve seats, Refer to Valve Seat.