Re: New guy with a FE 427 overheating problem
Theres a few possibilities and the headgaskets are one.
First off is it actually getting hot and overheating or is it just pressurising in the cooling system.
Make sure radiator cap is good and not faulty. If it is overheating then you need to be sure the thermostat is working correctly and that the radiator is clean. If all these check out then if you can put a pressure gauge on the radiator then start the vehicle and see if there is a fast increase in pressure which would suggest compression enter the cooling system. You could do a cylinder leakdown test as another way of checking which bank is the problem.
71 429SCJ Mustang