General Category > Quadrajet Carb Talk and Tips
66 GTO 455 overheating
Jeffs68:
--- Quote from: tayto on June 08, 2016, 04:13:47 PM ---Get something to shut coolant flow off to the heater core then. I've seen guys run a ball valve and shut off flow during warmer weather (extremely low tech). I would opt for a vacuum actuated valve myself, like GM used to shut off coolant flow to the heater core when AC was turned on. I'm sure you could source a 12v solenoid vacuum valve that could be run in parallel with the fan control switch which would allow vacuum to flow to a coolant bypass valve. AC controls of your era are generally a lot different than non-AC controls so it might not be as easy to adapter year correct equipment...
--- End quote ---
Your fix would only remedy the in car temps, he is talking about underhood temps.
429bbf:
not a gto guy but i do know a little about cooling and cooling systems . heres a ruff breakdown . 30plus percent is done by the radiator , 30plus is done by the exhaust and 30plus is thermal . give or take we can argue this all day . heres what I'm getting at . when you stop or drive real slow you just lost about 30 percent of your cooling from thermal you've actually even got worse because the heat from the rad. now has no where to go. so id say on a hot day in slow traffic it might run as hot as 230 with a good cap . you might try putting in straight water , you loose o lot of cooling from a 50-50 mix. fwiw
tayto:
--- Quote from: Jeffs68 on June 09, 2016, 12:11:27 PM ---
Your fix would only remedy the in car temps, he is talking about underhood temps.
--- End quote ---
My bad, I mis-read that the interior gets hot.
Hillbillyenginering:
429bbf.
I don't want to sound like I am splitting hairs. But the Brits and euro's diviude out energy created/used by 33.?% exhaust, 33.?% thermal from heat loss, and 33.?% useable energy through drive train.
They way you have it. The engine couldn't run.?
I know. I sound like a loose sphincter muscle. Sorry!
429bbf:
you must be an engineer . im trying to keep it simple for folks on here like me. example . some folks don't understand that if you put 6 coats of paint on an engine you will loose part of your cooling ability. if you have a heavy antifreeze mix you loose cooling ability.if you move the coolant to fast threw a radiator it will not cool at all . lets keep it simple.
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