Themostat housing gasket

[RDThompson]

I'm preparing to do a frontal assault on my 6.7 in my 08' Can anyone here tell me if there is a gasket or O-ring or just RTV as a seal for the housing.
I did a search here but came up empty.

Thanks, Bob T.

 

[SnoKing]

Just a shouldered o-ring. Well machined spot on block and housing. NP, quick installation. Snoking

 

[RDThompson]

Thanks, There's a square shouldered O-ring or seal surrounding the new thermostat but I thought there might be a seal for the housing itself.