Make sure the bolt holes are clean, the surface is flat on the intake side, look at the bolt holes to make sure they have not pulled out from over tightening, smear a little rtv on one side of the gasket, make sure the t stat is oriented correct ( some have a bleeder hole or a little gizmo that is like a loose plug, very small, this should be at the top) and put the gasket on the housing with the t sat in place, let it sit for a half hour or so, make sure the t stat is still in place then smear a little rtv on the intake side of the gasket or the intake it self, install the housing to the intake tightening the bolts evenly, I could not find a torque spec in my magic book but it's not a lot. Snug one bolt then the other going back and forth till tight. I let stuff set over night but a hour or two is sufficient.