2. Ream the hole in the cylinder block to a new repair size to press on a new guide bushing.
3. Using the special tool (03221-3F100 A/B), press in the valve guide. The guide must be pressed in through the top of the cylinder head. Note that the intake and exhaust valve guides are different lengths (intake 39 mm, exhaust 43 mm).
4. After pressing in the guide bushing, insert the new valve and check the clearance between the valve stem and the guide bushing as described above.
5. After replacing the guide bushing, make sure the valve fits tightly in the seat. If necessary, ream the valve seat.