Valve Guide: Testing and Inspection

Valve guides, checking

Special tools and equipment required





^ Universal dial gauge holder VW 387
^ Dial gauge





Work sequence
- Insert valve in guide. End of valve stem must be flush with guide. On account of differing stem diameters, use intake valve in intake guide and exhaust valve in exhaust guide only.
- Determine sideways play.





Wear limit

Note:
^ If the wear limit is exceeded, repeat the measurement with new valves. Replace the cylinder head if the wear limit is still exceeded. Valve guides cannot be replaced.
^ Use a new valve for measurement purposes if the valve is replaced as part of repair work.

Checking valves
- Visually inspect for scoring at stem and surface of seat. Replace valves if distinct scoring is noticed.