Valve Guide Servicing: Notes

Inspection

1) Make sure valve guides are clean and clear of debris. Attach dial indicator and Adapter Fixture (VW 387 or US 4420A) to mounting surface of cylinder head. Insert new valve into valve guide. Use correct valves in respective guides. End of valve stem must be flush with upper end of valve guide.

2) Tip of dial indicator must rest against side of valve head. Rock valve back and forth against tip of dial indicator. Maximum reading on dial indicator is .039" (1.0 mm) for intake valves and .051" (1.3 mm) for exhaust valves. Only replace guides in heads that have valve seats that can be resurfaced.