My '82 brat will not go over 60 mph without overheating. I've flushed it, replaced it, I even have both the fans on it and it just keeps getting hot. If I do 0-59 mph everything is cool, and if I sit at stop light for 5 min it's all cool. Do 61 mph, shows over, gotta stop along the road. Oh I even put a new thermostat in, it helped a little do to the fact someone just took it out all together. The only thing left is the ?water pump? isn't it. If anyone has any idea let me know it's making me mad.

 

 

Jeff

I had the same problem last year. I replaced everything before finding out the radiator was bad. If you already replaced that then the waterpump is all thats left except the hoses. I also went with a 185 thermostat and that helped. Good luck.

From what I've read, flushing our radiators is more a preventive messure than a fix. Once they're clogged, flushing isn't going to help much. I had a similar problem with my 87 and the radiator fixed it. The limited flow just can't get the job done above 50-60 mph.