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LS short box · 05-11-2023, 04:56 PM

Just a tip that has worked for me. Before you install the new stat I drill three 1/8" holes in the metal flange that hold the gasket. Seems to help getting first start air pockets out of the system.

05-11-2023, 04:56 PM	#7
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,943	Re: LS3 Thermostat issues Just a tip that has worked for me. Before you install the new stat I drill three 1/8" holes in the metal flange that hold the gasket. Seems to help getting first start air pockets out of the system.