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Manifold


Cbitz233

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Burned valves are more likely to be red than black.  Black color is an indication of ignition or carburetion problems causing incomplete combustion or a rich mixture.

A burned valve can best be confirmed by a compression test and a leakdown test.  Run a compression test on all cylinders.  If one is low, then run a leakdown test and listen for where the air is going out.

jack vines

 

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