Quote Originally Posted by Scottydoggs View Post
the 2 yellow o rings would be for the lim to sc only i guess.

the other two black o rings next to the yellow ones look to be for the coolant elbow. but its best to just replace the whole elbow. and they come with new o rings.

the t stat, ive heard of people just using the black t stat ring and it seals. i used both, the ring and a paper gasket. no leaks so why not use it.
Interesting - good to know that using both gaskets worked for you on the thermostat housing/thermostat seal. I guess worst case scenario, it starts leaking but at least it's easy to access. Still no idea on that blue cylinder looking piece, eh? I know, I know....