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Re: Head Gasket Replacement
Posted to Technical Discussion Forum on 1/7/2019 1 Reply

do you have any misfires? mode 6? If so, and it has passed hc testing, set it up for leakdown testing in the affected cylinder and have a pressure tester on the rad. it will show an increase in pressure. Had a gm a few weeks ago and this is how i confirmed it.... Login to read more.

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