Grand Marquis V8-4.6L VIN V Flex Fuel (2006)
Valve Seat: Service and Repair
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.
Valve - Seat Width
1. Measure the valve seat width. If necessary, grind the valve seat to specification.
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Measure the intake valve seat width.
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Measure the exhaust valve seat width.
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Recheck the valve spring installed length after the seats have been ground, and shim the valve springs as necessary to achieve the correct
installed spring length.
Valve - Seat Runout
1. Use a valve seat runout gauge to check valve seat runout.
