A valve guide has 0.015" bellmouth wear. Technician A says to knurl and then ream the guide to size. Technician B says to repair the guide with a replaceable guide insert. Who is right?

Question

Quizplus · Accepted Answer

A bellmouth wear of 0.015" is significant and would require a guide replacement. Repairing it with a replaceable guide insert is the most appropriate and cost-effective solution. Knurling and reaming the guide to size may not always guarantee a tight fit and can result in further wear and damage to the guide.

A Valve Guide Has 0