BearKiller

I am replacing the thermostat in a 1989 DodgeCummins.

The only seal/gasket I found on it is a thick rubber ring.

Is this all the gasket there is??

Can I clean and lube the rubber ring and re-use; or do I need to find a new one??

The engine lift ring is behind the water-neck.

Are there no gaskets between these pieces??

Thanks for all the help.

Geico266

I had to use form a gasket as the "seal" leaked. If it's in good shape you are okay, but if it has cracks you should use it and the form a gasket.

I ahve a 180 & a 190 degree thermostate and change back and forth for the summer. **** I know, but its make a big difference in the winter.

97catintenn

You should be okay, the rubber gaskets are reusable and dont require the the orange/red RTV sealant (gasket maker stuff).