Thermostat problem? 99 GMC savanna cargo 2500 5.0 liter

if you follow the hoses coming off the radiator one of them should go to your water pump and the other should go to your thermostat housing the thermostat should be under the housing. the thermostat housing is usually on the coolant return hose on the engine.

Yes, try a 180 thermostat, with a 195 the fans will not turn on until about 210.

It will be in a housing, where ever the top rad hose goes into the motor.

I would suspect either the temp guage or the coolant temperature sensor being inaccurate. The new thermostat is probably working good, or else you wouldn't have a very warm heater. If you have electric radiator fans, you might check to see if they are running all th time. Electric cooling fans should only come on when the temperature sensor reaches a predetermined coolant temp, or when the a/c or defroster is turned on. If the fan runs all the time, the engine would not reach normal operating temperature.

Sounds like a faulty thermostat ( in the engine block ). More info, let me know.

Charlie

210 is normal operating temperature for these, they run hot. New valves may be bad.

try heating it with a heat gun, then slide a paint scraper in between the pan and trany

the engine is designed to operate at 210 to 220 degrees, so all is normal

It shouldn't go above 210. That is where the thermostat is supposed to keep it. More than likely, you need a new thermostat. It sounds like it is sticking closed until it gets hot enough to 'pop' it open. Then it operates normally. Change it before it stays stuck.

Good luck, and I hope this helped!

thermostat is sticking