New motor overheating!!! - Lateral-g Forums

andrew5 · #1 03-27-2008, 05:57 PM

i just put a 454 in my chevelle.ran at 185,190 for the first 5 or 6 test runs.then it overheated.it was the brand new mr gasket t-stat as well.took it out and it was stuck closed.put in a gm one and had no problems since.

DRJDVM's '69 · #2 03-27-2008, 09:22 PM

Yeah I boiled the crap out of it...it didnt open....POS....

Blown353 · #3 03-28-2008, 01:47 PM

So did a new thermostat fix the problem?

I know it sounds paranoid, but before I put a thermostat in anything I always dunk it in boiling water. I'd rather take the 5 minutes to test it than have to drain & refill the cooling system again after having to change a defective thermostat!

DRJDVM's '69 · #4 03-29-2008, 04:53 PM

With no thermostst it runs 150-170 no problem.

I'm gonna get another thermostat (not a Mr Gasket) soon since I dont want it running that cool, but it will work for now....... I think I'm gonna pre-test this one first

MtotheIKEo · #5 03-29-2008, 09:20 PM

I had a MR.Gasket thermostat that would stick closed also. I don't think Ill buy another one from them again.