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post #4 of (permalink) Old 09-29-1999, 08:03 AM
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Re: 35 PSI in #4 CYL

You can run indefinitely if you have a cracked or burned valve(s) but perfomance will suffer greatly, and as a disclaimer it is not prudent to run a engine in this condition as it could potentially cause addtional problems over time. Listen to the exhaust at idle you may be able to detect a hiss that would indicate an exhaust valve, listen to the carb for a hiss as well to indicate an intake valve. If it is a valve problem and the cam hasn't been compromised a valve job will run you 3-6 hundred dollars, do it yourself and save and learn, a machine shop will fix the head for about 1-2 hundred dollars depending on the extent of work needed - maybe it is time to check into the 4.0L head and MPI conversion.

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