contrail1

I have a 94 5.0 and I'm looking to replace my thermostat. I replaced the hosesand the collant but she's running hot and the fan is staying on all the time. I'm replacing the thermostat but is there a thermostat gasket I need to buy or is RTV sealant all I need?

bouchermb

The thermostat should have come with a gasket.

86 5.0L

^+1

it might also be your radiator clogged, get it flushed

paulstang

Stant has stopped including gaskets with there thermostats. The person at the parts counter will help you with the gasket. You will need a little sealant around the housing or IT WILL LEAK.

contrail1

Thanks bro, but with the parts I have to order them online being that I'm in Germany and that's why I wasn't too sure about a gasket or sealant and I'll get a flush first to see if that will change anything.

mjr46

to be safe I usually coat the gasket with a thin layer of sealant..to make sure is seals..cause if the two mating surfaces are slightly pitted the sealant will take up that space and not render a leak later on

contrail1

Will do, thanks for the advice bro

P Zero

+1 on the radiator. More than likely some of the cooling fins have corroded away and its just not able to cool properly. I had a similar problem a couple of years ago. Car would run hot even though it had a 180* t-stat and fresh coolant (and I did flush the rad and block). I checked my fan clutch it was ok, pulled off the fan shroud from the rad. and found that the fins were gone. Replaced it with a 3 core Police package rad. and now she stays cool as a cucumber even in 100+ temps.
-P.

bouchermb

Not providing gaskets is ridiculous. What, do they expect you to re-use the old one?

contrail1

You kinda lost me when you say the fins were gone, are you talking about the fan blades themselves? If I take off the shroud, I'm guessing the black plastic that covers the radiator or am I lost all together?