View Full Version : Thermostat on my LT 1 engine does not open please help!

07-17-2010, 01:18 AM
I've got a new waterpump installed on my 1996 LT 1 engine after my old one was leaking and now the engine overheats after driving a few hundred meters and thermostat does not open.
I took the 160 degree thermostat out (on top of the waterpump) and everything was fine - engine run again at normal temperatur. I also put the t-stat in hot water and it opened fine.

does anyone have an answer to this problem?

I also exchanged the impeller which missed a few rubber bits and had a look if anything was stuck in the cooling system but couldn't find anything so far.