[pontiacstogo]

Originally Posted by silverbullet07

I would get a hand held thermal thermometer and check the temperture of the thermostat housing when it heats up. Check the temperture differerece between the top and bottom hoses to see what the temp difference is.

A digital infared thermometer is a great tool to have on hand for this sort of thing. My factory gauge shows 220 but my digital thermometer shows 190 at the thermostat housing. There are millions of them available on eBay or Amazon for not a lot of money;

https://www.amazon.com/Nubee-Non-con...ed+thermometer