For a positive seal to work properly, the inside of the valve guide must be concentric with the outside (O.D.).

Name: For a positive seal to work properly, the inside of the valve guide must be concentric with the outside (O.D.).
Brand: Quizplus
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Question

Quizplus · Accepted Answer

A positive seal relies on the valve stem being centered within the valve guide, which requires the inside of the guide to be concentric with the outside (O.D.). If the guide is not concentric, the valve stem may not be able to seal properly against the valve seat.

For a Positive Seal to Work Properly, the Inside of the Valve