OK I have a 1986 IROC-Z TPI 305 that is overheating. I Replaced the motor Put in a NEW/Rebuilt AC in it Replaced the water pump and New Radiator. It seems to run at about 200 degrees with the AC off and over 230 with the AC on. I even sent back the Crate motor and replaced it but is still overheating. Shroud is there and Fan is on connected Direct. I am just stumped now. any info can help...

 

Do you have the air dam in place under the car???? Important item in the cooling system operation.....

 

yes I have it.still overheating. I have changed everything too. including the CAT. Still getting hot

 

Well that is what I was going to ask. Always make sure that air dam is on there. Do you still have the plastic radiator on the car? I changed mine, and that helped on my 92 and 91

 

What do you consider being too Hot???? A/C on or off???

 

What degree thermostat are you running????