Downloads >> Process Mapping Templates >> Engine Rebuild >> Valve Head Inspection

How to Rebuild an Engine

Valve Head Inspection

1. Identify cracks
• Tools needed: Magnafluc
• Tools needed: Dye Penetrant
  
  
2. Check for flatness
• Note head flatness on Valve Head Inspection Worksheet
• Tools needed: Straight edge
• Tools needed: Feeler gauge
  
  
3. Check for worn guides
• Note worn guides on Valve Head Inspection Worksheet
• Tools needed: Dial Indicator
  
  
4. Check for seat recession
• Note worn seats on Valve Head Inspection Worksheet
  
  
5. Check for worn stems
• Replace all valves with stems that are worn beyond OEM specification
• Tools needed: Micrometer
  
  
6. Check for worn keeper groves
• Replace worn keepers
  
  
7. Check for thin margins on valves
• Margins thinner on intake valves
• Compare with OEM specification: Replace all valves with margins below specification
• Tools needed: Micrometer
  
  
8. Measure valve springs
• Tension - compress spring to designated length
• Measure free length
• Measure for squareness
• Replace any springs outside OWM specification
• Tools needed: Spring compressor
• Tools needed: Micrometer
• Tools needed: 90 degree straight edge

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