The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - T-stat to drill a hole or not to drill a hole?

mike16 · 02-25-2018, 01:45 PM

the hole is intended to blead any air that is in the block or heads. if air remains around the thermostat it will not transfer heat to open the thermostat and effectively as water would. and your engine may overheat while the radiator remains cold.

its a small hole to blead air not to by pass so dont go overboard like in some of the pictures above.

02-25-2018, 01:45 PM	#29
mike16 Registered User Join Date: Dec 2009 Location: bisbee, arizona Posts: 1,529	Re: T-stat to drill a hole or not to drill a hole? the hole is intended to blead any air that is in the block or heads. if air remains around the thermostat it will not transfer heat to open the thermostat and effectively as water would. and your engine may overheat while the radiator remains cold. its a small hole to blead air not to by pass so dont go overboard like in some of the pictures above.