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**Shane@DBPerformance** · 11-13-2007

Under boosted combustion you might have 1000-2000psi of pressure in the cylinder, so often a simple compression test or leakdown test doesn't show anything for a headgasket that only leaks under boost.

11-13-2007	#19
Shane@DBPerformance formerly ecoli Join Date: Oct 2003 Location: On the dyno Posts: 4,892	Re: Blowing out antifreeze Under boosted combustion you might have 1000-2000psi of pressure in the cylinder, so often a simple compression test or leakdown test doesn't show anything for a headgasket that only leaks under boost. __________________ www.dbptuning.com