Greeting all. I have a 1988 Bonneivlle LE with engine 'C'. I replaced the T stat with Stant. The car still didn't warm up. If I let it idle for a while it would reach 180 degrees but once I started to drive, the temps would fall to about 110-120,
So I got a Tstat from the dealer and noticed the new Tstat had a Oring around the Tstat. I tired to put the Tstat in but it seems with that seal around the Tstat, it was too big to go in. Do I have the right T stat?
The part number on the box reads ACD# 131-115 GM# 24506986
Maybe I'm supposed to take that seal off the Tstat and place it on the engine block before I put the Tstat in?
The other O ring you see in the photo is one I got from Pepboys. That'* what their book called for.
Maybe if I put that smaller seal on to the Tstat like this and removed the seal that came with the AC Delco Tstat it would work?
What do you guys think?
The O ring on the goose neck housing (the one held down by one bolt) is fine.