Valve Guide: Testing and Inspection

INSPECTION





Check the valve stem to guide clearance. If the clearance exceeds the service limit, replace the valve guide with next oversize part.

Valve stem-to-guide clearance:
Standard value:
Intake: 0.020-0.050 mm (0.0008-0.0019 inch)
Exhaust: 0.050-0.085 mm (0.0019-0.0033 inch)
Limit:
Intake: 0.1 mm (0.004 inch)
Exhaust: 0.15 mm (0.006 inch)