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Trialblazer 4.2 L6 engine - porous cyl head?
Posted to Technical Discussion Forum on 3/27/2012 5 Replies

This vehicle came in with a misfire... cyl 3 plug port had some coolant in the hole - not full, but enough to get the plug boot wet...

cyl head leaking through?? No signs of coolant on top of the engine, just in the #3 plug hole...

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