I'm having a problem with my '91 overheating. It's only started now that the temps here are hitting 100+.
Symptoms-
Temp will start creeping up above 230 on both the highway and city streets. Turning off the A/C will yield a reduction in temp. While on city streets this reduction is pretty gradual but on the highway it is pretty pronounced.
The truck has a new 3 row CSF radiator, new water pump, all new hoses, new fan clutch, new dealer thermostat.
I do not notice an unusual drain on the power of the motor when the A/C kicks on, and the A/C seems to be cooling normally.
The higher temps only show up if I've been on the road for more than 30 minutes. Trips shorter than that do not result in higher than normal temps.
At no point do I notice any loss of power, so I'm thinking that the cat might not be the problem.
Should I be focused on the A/C compressor or could it be that that is enough load to push a system running on the edge over it?
Could there be another source of the excess heat? Tranny maybe? If I rig up a temp sensor for the tranny where should I mount it?
Symptoms-
Temp will start creeping up above 230 on both the highway and city streets. Turning off the A/C will yield a reduction in temp. While on city streets this reduction is pretty gradual but on the highway it is pretty pronounced.
The truck has a new 3 row CSF radiator, new water pump, all new hoses, new fan clutch, new dealer thermostat.
I do not notice an unusual drain on the power of the motor when the A/C kicks on, and the A/C seems to be cooling normally.
The higher temps only show up if I've been on the road for more than 30 minutes. Trips shorter than that do not result in higher than normal temps.
At no point do I notice any loss of power, so I'm thinking that the cat might not be the problem.
Should I be focused on the A/C compressor or could it be that that is enough load to push a system running on the edge over it?
Could there be another source of the excess heat? Tranny maybe? If I rig up a temp sensor for the tranny where should I mount it?