Originally Posted by 91buickman
dont use RTV either
What does this have to do with anything? Did he ask that? You're straying again, Buickman. Please read the PM I just sent you.
In this particular case, you're wrong again. There are some conditions where you WOULD use RTV. Aluminum (especially in former DEX and current salty winters) corrodes and pits.
It'* a good idea to apply a skim coat of RTV to these areas if necessary. Especially around the water outlet before the thermostat is reinstalled, but sometimes just the same around the coolant ports in the top of the LIM before placing the UIM gasket.