Valve Guide: Service and Repair

Valve Guides, Replacing

Special tools and equipment

- 3360 Drift
- 3361 Support
- 3363 Hand reamer and cutting fluid

Removing
- Check whether valve seat insert rings and if necessary cylinder head sealing surface can be reworked. If not, valve guide should not be replaced.





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





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

Installing

Note: When the shoulder on guide makes contact, the pressure must not exceed 10 kN (approximately 1.0 t) 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.