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Valve Seat Reconditioning Procedure

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Recondition valve seats.
  2. The valves must seat perfectly for the engine to deliver optimum power and performance.
  3. Ensure that valve seat and valve are not shrouded after valve seat reconditioning. Adequate flow past the valve seat and valve is essential for cooling the valve head and valve seat area.
  4. Correct contact between each valve and its seat in the cylinder head is also essential to ensure that the heat in the valve head is properly carried away.
  5. The valve seats should be concentric to within 0.002" (0.050 mm) total indicator runout.
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