YipTheYapper

Hi. I had a similar overheating issue on my 87 Comanche. I changed out the water pump, t-stat and temp gauge, the aftermarket temp gauge was busted and not reading at all. I installed the new temp gauge and didn’t connect it to ground, so it was slowly claiming up to 240-250 degrees. I used a temp gun on the engine, reservoir and hoses all giving me a reading of about 140-160 degrees. long story long, I checked the temperature gauge and noticed that I effed up and didn’t connect it to ground, only had the ignition and the sending unit connected. Once I connected the ground to the body, started it back up and Wham! now the temperature I was getting with the IR gun, was the same temperature as the gauge. Word to the wise- listen to crusier54. IR temp gun definitely needed. side note- you can also have a partial clog in the radiator. Running your temperature gun up/down and across the radiator will let you know if you have any cold spots.