Yesterday on the way to Grandma's house the cooling fans kicked on high speed unexpectedly. The temperature gage read 235. After returing home, I checked the water and oil level just to make sure nothing obvious was wrong. After cooling for a few minutes I started the engine and turn on the air conditioner while sitting in idle. After a couple of minutes the gage jumped to 235 degrees and the fans kicked to high. Yet, the engine does not seem hot (that feeling you get when standing next to a hot engine) and after shutting the engine off, the water hoses we not pressurized. After a few minutes I could take the water cap off without any backflush. Sooo, I suspect I may have a bad heat sensor. Three questions: Is anyone aware of heat sensor problems? What else could cause sudden heating (never had this problem before)? And, where is the heat sensor located?

ps: My son is attending Mechanics school at UTI. After six months he thinks he knows everything there is to know about automobiles.....He mentioned that GM had a 'recall' on the orange cooling stuff and that I should flush it out. Has anyone hear of a recall (or at least a bulletin) on the orange stuff?

pss: I have a 98 coupe.....................bj98

OOOOPS !....I ACCIDENTLY POSTED THIS TO THE WRONG FORUM. SORRY.

 

I'm in the same boat. My Vette with the blown 383 runs way too hot. Tonight I'm gonig to order a Griffin from Summit.

Has anyone installed one of these in their early C4 (85)? If so, what part number did you go with and was it worth it?

The claim is that the aluminum radiator drops the temps almost 40 degrees.

UPDATE: Well -- Just did it. I ordered the aluminum Griffin GRI-6-584AF-BAX from Summit. Dang that thing was expensive

It should be here by Wednesday, I'll let you know how much it helps.