Over Heating

Posted by packard666 On 2015/7/25 16:29:59

Have a 48 Custom 356 that overheats within 15 minutes of driving. Rebuilt the radiator, put in new water pump, flushed the heck out of block but still have problem. Used heat gun to confirm temp going to 180 degrees and then into the red. Has a 140 degree thermostat in it which opens and temp drops, then goes back to red.

Any ideas?

Had this same problem with my 49 327, put in a new radiator that builder said would cool a Mac truck, and same problem, so I just ran it without a thermostat and it was ok.