Photo Gallery: Compression Check-Up

If a cylinder has a low reading some mechanics squirt a little engine oil into the cylinder and retest. If the piston rings are bad the compression will increase 10 or 15 p.s.i. If the culprit is burned valves it will not.

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autoMedia CARnival 11-27-09: This week in Auto Blogs

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Photo Gallery: Compression Check-Up

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