Five Hundred AWD V6-3.0L VIN 1 (2005)
Valve Seat: Service and Repair
Valve Stem Diameter
1. Measure the diameter of each intake and exhaust valve stem at the points shown. Verify the diameter is within specification.
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If out of specification, install new components as necessary.
Valve Inspection
1. Inspect the following valve areas:
1
The end of the stem for grooves or scoring
2
The valve face and the edge for pits, grooves or scores
3
The valve head for signs of burning, erosion, warpage and cracking
4
The valve margin for wear
Valve Seat Inspection
Valve and Seat Refacing Measurements
CAUTION: After grinding valves or valve seats, check valve clearance.
1. Check the valve head and seat.
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Check valve angles.
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Check margin width.
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Be sure margin width is within specification.
2. Inspect for abnormalities on the valve face and seat. Install a new cylinder head assembly if abnormalities are found.
