Okay.
Stant Tstat, 50/50 blend coolant, filled in upper hose and then in resevoir.
Drove 72 miles (to bar and back) and twice the needle touched the bottom if the 120 numbers, not quite to the overheat point but close enough that I was ready to pull over and stop the engine.
I took the first 'new tstat out of the parts car. The spring part of the tstat was in the part of the housing that you can hold in your hand, the 'left hand' part.
When I took the tstat out of the 81, the tstat was in the same way. I assumed that this is the right way to put one in, spring part in the left part of the housing.
Is this wrong? Tom's car (parts) was running hot all the time. The Tstat of the 81 was bad, not getting the engine to temp. Could BOTH tstats been put into two cars wrong?
Help!
I'm ready to put the broken one back in since it's getting warm here and driving the car with the tstats I have will just lead to overheating.