how to detect valve problem in ford 500

Asked by Guru9DQ8H Jun 04, 2017 at 07:01 PM about the 2007 Ford Five Hundred SEL AWD

Question type: Maintenance & Repair

3 Answers
223,915

Rowefast answered 7 years ago

When doing a compression test check the compression first. Then squirt some oil into the cylinder and check the compression again. If the original cylinder compression was low when first checking, then checking it again with oil in the cylinder, and the compression does not change, then it would be a bad valve.

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