Valve Guide: Service and Repair

REMOVAL
Using the valve guide installer tool No. 09222-21200A, or equivalent, push the valve guide out toward the cylinder block with a press.

INSTALLATION






1. Machine the valve guide insert hole in the cylinder head to the specified oversize of the new valve guide.






2. Using the valve guide installer tools No. 09222-28400 and 09222-21200, or equivalents, press and fit the valve guide.

NOTE:
- Using the valve guide installer makes it possible to press and fit the valve guide to a predetermined height.
- Install the valve guide from the top of the cylinder head.






- Note that intake and exhaust valve guides differ in length (45.5mm [1.791 in] for intake and 50.5mm [1.988 inch] for exhaust).

3. After installing the valve guides, insert new valves and check the clearance.
Standard value:
Intake, 0.020-0.047 mm (0.0008-0.0019 inch).
Exhaust, (0.0020-0.0033 inch).
Wear Limit:
Intake, 0.10mm (0.0040 inch).
Exhaust, 0.15mm (0.0059 inch).
4. Whenever valve guides are replaced, check for valve-to-seat contact, and recondition the valve seats as necessary.