Valve Guide: Service and Repair

1. Using suitable tool, machine off protruding valve guides from camshaft side until guides are flush with cylinder head.
2. Place cylinder head on tool 9220 or equivalent.
3. Loosen valve guides from camshaft end with short blows from hammer on tool 9224 or equivalent and press out remainder of guides toward combustion side.
4. Coat valve guides with suitable lubricant, align guides and press into cylinder head against stop from camshaft side. Press fit for valve guides is .0024-0031 inch (.06-.08 mm). Valve seat inserts must be machined after replacing valve guides. Exhaust valve head diameter is changed from 1.259 inch (32 mm) to 1.338 inch (34 mm). The bearing surface on the cylinder head, however, is machined .078 inch (2 mm) deeper, which is compensated for by the use of .078 inch (2 mm) thicker stepped washers.