For 1990-2009 cars only
- Inspect the valve stem tip for wear.
- Inspect the valve key grooves and the oil seal grooves for chips and wear.
- Inspect the valves for burns or cracks.
- Inspect the valve stem for burrs and scratches.
- Inspect the valve stem. The valve stem must be straight.
- Inspect the valve face for grooving. If the groove is so deep that refacing the valve would result in a sharp edge, replace the valve.
- Inspect the valve spring. If the valve spring ends are not parallel, replace the valve spring.
- Measure the valve spring height. Refer to Engine Mechanical Specifications . If the valve spring height does not match the specifications, replace the valve spring.
- Inspect the valve spring seating surface of the valve rotators for wear or gouges. Replace as required.
Cleaning Procedure
- Clean the cylinder head.
- Clean the valve guides.
- Clean all of the threaded holes.
- Clean the valves of carbon, oil, and varnish.
Caution: Refer to Safety Glasses Caution in the Preface section.
