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Temperature gauge going up and down

Johnny605

New member
Joined
Dec 22, 2015
Messages
3
Location
Tuttle' ok
Corvette
1982 corvette collector edition
Have a 82 CE, and problem with the temperature gauge. Either in park or driving, the temperature will rise to 230 degrees, the back dowm to 195. Have install new termostat, sensor, and gauge. Did a flow test when the engine was cold, no fluids was moving until the engine was at operating temperature. Check the fan clutch and when the engine stop, so did the fan. After driving the car, was able to touch the radiator return hose without burning myself. Don’t know where to go from here.
 

bill81vette

Moderator
Joined
Jan 17, 2004
Messages
4,321
Location
Troy,NY
Corvette
1981 dark blue metallic
I would check the radiator and make sure it is not plugged..
Is it the original?????
that what it sounds like from your description.
also make sure all your air dams are in place.
 

stevolwevol

Well-known member
Joined
May 28, 2015
Messages
250
Location
Michigan
Corvette
1977 light blue
My needle was bouncing around the other day, and it was a bad connection at the temp sensor. I pinched the connector to make it tight, and it's ok now. It wouldn't hurt to check.
 

stevolwevol

Well-known member
Joined
May 28, 2015
Messages
250
Location
Michigan
Corvette
1977 light blue
I owned a Chevy pickup with a 350. My temp gauge would fluctuate, but I wasn't alarmed. I was changing valve seals, and I notice one of my plugs was washed clean. When I removed the head I discovered a crack in the water jacket, and it was going out the exhaust. I probably could have driven the truck indefinitly, but that was the cause in this case. I was also ever so slightly loosing coolant.
 

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