Execution order
1. Using a valve guide installation tool, press the valve guide out of the cylinder head toward the cylinder block.
2. Place a new oversized valve guide bushing into the cylinder head bore.
3. Using the valve guide installation tool 09221-22000, press the guide into the cylinder head. The tool ensures that the guide is pressed in to a precisely defined depth. Measure the protrusion of the upper part of the valve guide from the cylinder head. Note that the protrusion of the valve guide is different for intake (47.2 mm) and exhaust (39.1 mm) valves.
4. After pressing in the valve guides, insert the new valves and check the clearance.
5. Each time the valve guides are replaced, check and replace the valve seats if necessary.