'95 3100 Overheating problem

[Compufreek]

LOL, thanks man. The car seems to run/drive fine but it is wierd seeing it "overheating" but not really.

[ikessky]

I was just talking the other day to a guy who had been chasing a similar problem on an older Mustang. He had done a lot of things like replacing the t-stat and all the hoses, boiling his radiator, flushing the system numerous times, etc. He even went as far as changing the head gaskets thinking that was leading to the overheating problem. He finally decided that he should maybe check the gauge and the sender. Turns out that is what was causing the "over heating". Through a lot of money at a very simple problem.

[Compufreek]

Yeah I have already been through most of the system. I figured something went bad from having all the gunk from LIM going but I am willing to bet that it is just the sensor that's all that's left and for $10US it is worth a try seeing as I have already sent around $50 on other crap

[Compufreek]

Ok just an update and a quick question. I have changed the sensor that is on the thermostat houseing and the gauge seems to be more reasonable. It shows now that the car is running in the 210 to 240 range. This is fine as far as I am concerned because it is not overheating but before all this happened (starting with the LIM gasket) the car would run in the 190-210 range. I have noticed that the fan doesn't come on until the gauge reads just above 240 and then it brings it back down to "normal". Before me the car was completely GM seviced, is it possible that they had put in a 180* thermo?

[DEI37]

I doubt they tossed in a 180*. It MAY be that the guage is out of whack. I had a '92 GP that was this way...the computer saw the coolant temp at 196*, and the guage read 160*. Hook up a scan tool, and monitor the temp that the computer is seeing. If it's under 210*, don't worry about it. If it's more than that, start looking.