Suspect cooloing fan or radiator effeciency reduced to calcium buildup in core

Answered by Docfixit (expert)
18,443 answers provided

If the gauge shoots up immediately and cooling fans works, it would be an inaccurate reading due to a bad ground circuit connection, behind the headlights.

Answered by KHLow2008 (expert)
39,956 answers provided

most likely this would be caused by a bad ground connection.

Answered by timhillmer
2 questions asked

Thanks for help. Replaced clogged radiator, power washed the air conditioner condenser. I could not believe the road crud that washed out. While I was there I replaced the hoses and thermostat. To my surprise, the thermostat had been removed. There wasn't one. I bought this Z used. Previous owner must have had overheating issues as well. Not sure what fixed the problem ( maybe all of the above) but temp gauge is level no matter if air is on or not and it is 110 degrees out.

Response from weverett
1 question asked