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Cylinder Head: Valves

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  1. Measure valve stem diameter at top, middle and bottom of valve stem. If valve stem is not within specification, replace valve. Measure valve head, margin and refinish length. Replace valve if not within specification. See CYLINDER HEAD  and VALVES & VALVE SPRINGS  tables under ENGINE SPECIFICATIONS.
  2. To check valve stem installed height, ensure valve is within minimum refinish length. See VALVES & VALVE SPRINGS  table under ENGINE SPECIFICATIONS. Install valve in cylinder head. Using caliper, measure valve stem protrusion from top of valve stem to spring seat.
  3. If valve stem protrusion is within specification, valve and cylinder head can be used without installing washer on valve spring seat. If valve stem protrusion is greater than specification, install washer on valve spring seat so distance is within specification.
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