went to a friends house this weekend, jumped on the highway and started cruizing, at 55mph it held a 190 degree temp, once i went faster it jumped to 230 and started to bogg, i turned it off and let it cool off checked the fluid and took back off, i have a stock radiator with a high flow water pump, 160 degree thermostat, 373 rear end and a 200r4, 70 350, so from what i can thing of is i need an alum rad, slower water pump? would this be accurate, around town its 180 but not on highway, i also have duel electric fans,
overheated!!
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If your using a Mr. Gasket t-stat, take it out and throw it down the street. Get a Miloden or another reputable brand t-stat. I've got a stock replacement radiator on mine and I've never had problems from overheating because of it. Stock GM water pump too. I'd check to make sure you don't have a leak anywhere and you are letting air get into the system.
I would suspect restricted radiator. If you have access to an infrared thermometer look for "cold spots" in the radiator while the engine is running at full temperature. You may be able to flush it but it is likely calcified and cheaper to replace than repair.
If it's an autozone aka mr. gasket, then chuck that thing. Me and my dad both tried the 160's, just like yours, in our cars and both of them overheated from the thermostat sticking. My motor is a sbc 350 with a 3 core radiator and my dad's is a 440 dodge with an aluminum 4 core radiator.
After that, we went to napa and both bought stant 160 thermostats. Neither one of us have had a problem since.
After that, we went to napa and both bought stant 160 thermostats. Neither one of us have had a problem since.
Stant IS best but before throwing it as far as you can, test. You put it in a pot of water and bring to a boil while useing a candy thermometer see when it and if it opens, and when it closes. You may be surprised at what you find, even with a new out of the box stat.
ok ill try a napa thermostat, but what i would like to know, is if im running a highflow waterpump and running at high rpm wouldnt that pull the fluid thru the radiator too fast to cool,
I have a high flow water pump and the 160 stat. While I'm driving on the freeway, it's about 170, on the street about 180. You won't have any problems with the water moving too fast through the radiator.
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