When I went to autozone, I bought a thermostat, and they sold me an o-ring, but when you look at the breakdown on their site it dosn't show a o-ring, it shows a gasket. Just wondering if I should buy the gasket.
O-ring is all you need, maybe a little blue silicone on the gooseneck for peace of mind, but it's not really necessary.
I did a new gasket, it was only $2.50.
get the gasket, cheap crap becomes expensive problem, dont forget the gasket sealant putty. it only another 1.50 or so