VALVE, VALVE GUIDE INSPECTION

1. Inspect the following valve areas:

• the end of the stem for grooves or scoring

• the valve face and the edge for pits, grooves or scores

• the valve head for signs of burning, erosion, warpage and cracking.

• the valve head thickness for wear

2. Measure the diameter of each intake and exhaust valve stem at the points shown. Verify the diameter is within specification.

• If out of specification, install new components as necessary.

3. Measure the inner diameter of the valve guides in two directions where indicated.

Standard valve guide inner diameter

IN: 6.06 mm {0.23858 in}

EX: 6.06 mm {0.23858 in}

4. If the valve guide is not within specifications, ream the valve guide and install a valve with an oversize stem or remove the valve guide and install a new valve guide.

5. Use a hand-reaming kit to ream the valve guide.

6. Reface the valve seat.

7. Clean the sharp edges left by reaming.