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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 30 (Engine Mechanical - 5.7L) >> Overhaul >> Cylinder Head >> Valve Seat

Valve Seat

WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Reconditioning the valve seats is very important. The seating of the valves must be perfect for the engine to deliver optimum power and performance. Several different types of equipment are available for grinding valve seats. Another important factor is the cooling of the valve head. Good contact between the valve and the seat will ensure that heat will be properly dissipated.
NOTE: DO NOT reface intake valves. Intake valves with excessive wear or damaged MUST be replaced.
  1. Inspect for a loose valve seat in the cylinder head. The valve seat has an interference fit to the cylinder head.
  2. Clean the valve guide bores with a suitable tool. Remove all carbon or dirt from the bores. The valve guide must be clean for the seat grinding tool to obtain proper results.
  3. Grind the valve seat. The recommendations of the manufacturer of the equipment should be followed carefully to obtain the proper results. Regardless of what type of equipment is used, it is essential that valve guide bores be free from carbon or dirt to ensure proper centering of the tool pilot in the guide.
  4. Inspect the valve seats:
    • The valve seats should be concentric to within 0.0021" (0.05 mm) total indicator reading.
    • If the valve seat has been ground, it may be necessary to shim the valve spring to attain the proper spring installed height.
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