Overheating issues

[hjewell2]

Originally Posted by BigMike

Yes, had a standard thermostat in it before trying the high flow. Thought the high flow would help since I have a high volume water pump. Made no difference.



Once I get all the parts to hook up a regulator I will re-tune and adjust the carb



The few colder days we get in Southern California it runs awesome! As long as the temps stay under 210 it does awesome. When it starts creeping over that then it's no fun anymore. Last time I drove it after having both fans come on at low temps it seemed like over 45 it did fine, but I got in slower traffic and had to drive at 40-45mph and it started getting hot again. The fan controller is set to turn off the fans at 45. It gets hot fairly quickly if I am just sitting in traffic and not moving much (again, result of living in SoCal) Both fans are pullers.

I have nothing but issues if the temps here are 80+ (which is most of the year) no matter what speed I drive



I really wish I knew the answer to this, if I did I wouldn't be here asking for help. I've owned muscle cars and trucks for nearly 40 years and have never had this problem on any other vehicle. Or if I did I was able to fix it easily. I have been fighting this for several years. I built my son a 72 Nova for his 17th birthday. We put a 350 in it & he has nearly the exact same setup as I do with the intake, carb, radiator and fuel pump. We put in a single 15" fan and it never overheats. Why I am having so much trouble with the truck is beyond me.

I hope you find a cure for this, I have the same exact problem on a 1980 Malibu. running a 160* T-stat and new rad new pump, electric fan and shroud and runs at 210 or higher Never had a chevy do this until now, new eddy carb runs just as hot when the quad was on there ETC ETC.