Valve Guide: Testing and Inspection

Valve guides, checking
When repairing engines or cylinder heads with leaking valves, it is not sufficient to reface the valve seats and renew the valves. The valve guides must also be checked for wear. This is particularly important on high-mileage engines.





- Insert valve into valve guide so that end of valve stem is flush with end of guide. Valve stems have different diameters, so only use an inlet valve in an inlet guide and an exhaust valve in an exhaust guide.
- Measure amount of rock.





Wear limit
If the wear limit is exceeded, replace cylinder head.