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Old 03-28-2011, 08:14 PM   #6
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Valve seat drop?

I have had two foci at the shop I work at that had that same problem. And yes, they were both cyl. #4. Don't remember if it was the intake or exhaust seat that dropped though. Both cars 100k+ miles. Machine shop replaced seat with slightly larger o.d. seat and replacement valve. No problems since. later.
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