Engine/Transmission (1994 - 1998) Radiator temp question

[chopperman]

This afternoon driving to work I was stuck in stop and go traffic due to an accident. The temp gauge had been working fine as usaul making it's normal swings when the temp got to around 180-190. With the ac on and stoped the temp rose to 190-195, and seemed to want to keep going. I turned off ac and temp stayed up there until I got going again. I changed the antifreeze last week and put in how much I took out. I know it was hot but truck has never run hot like that before. Should I change t-stat ? Or not worry about it. ? I realize I had more to go until the boiling point just concerned, Thanks for the replies, Brian

 

[B.G. Smith]

If it was the thermostat I would think it would act up while at highway speed too. Might be the fan clutch getting loose. Look at the fan whikle truck is running and shut off engine, fan should stop after about a couple of turns. bgl

 

[hsmith]

X2 on checking the fan clutch. Probably not locking up. You should be able to hear it engage at low speeds.

 

[chopperman]

Thanks for the replies I'll check that this weekend.