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Old 01-20-2020, 05:57 PM   #2
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Join Date: Jun 2010
Location: Detroit suburb, MI
Posts: 2,923
Default Re: Leak Down tester issue?

5% is considered good. You can also hear where the leakage is going by listening at the oil fill cap opening, the intake, or the tailpipe. Also bubbling in the radiator if it's a head gasket or crack.

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