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Old 02-22-2018, 09:46 PM   #15
garyd1961
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Join Date: May 2016
Location: Henderson NC
Posts: 975
Re: T-stat to drill a hole or not to drill a hole?

A bypass hose is what you need not a hole in your thermostat especially on a vortec. The bypass hose keeps the water circulating through the heads eliminating hot spots. I have never know a SBC to have a problem with air pockets, these old trucks ran with air in the radiator.
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