Valve Guide Replacement

REPLACEMENT

VALVE GUIDE
1. Using the SST(09221 - 3F100A), withdraw the old valve guide toward the bottom of cylinder head.




2. Recondition the valve guide hole of cylinder head so that it can match the newly press-fitted oversize valve guide.
3. Using the SST (09221-3F100A, 09221-26000), press-fit the valve guide. The valve guide must be press-fitted from the upper side of the cylinder head. Keep in mind that the intake and exhaust valve guides are different in length.

Valve guide length Intake : 36.3 - 36.7mm (1.4291 - 1.4449in) / Exhaust : 40.8 - 41.2mm (1.6063 - 1.6220in)




4. After the valve guide is press-fitted, insert a new valve and check for proper stem-to-guide clearance.
5. After the valve guide is replaced, check that the valve is seated properly. Recondition the valve seats as necessary.
VALVE GUIDE OVERSIZE






VALVE SEAT RING
1. Cut away the inner face of the valve seat to reduce the wall thickness.




2. Enlarge the seat ring hole of cylinder head so that matches the specified cylinder head hole inner diameter of new valve seat ring.
3. Heat the cylinder head to about 250°C(480°F) and press-fit an oversize seat ring for the cylinder head hole size.
4. Using lapping compound, lap the valve to the new seat.
VALVE SEAT RING OVERSIZE