i have a 88 iroc-z 5.7 tpi and on trips that take me like more than 25-30 miles she starts to get hot or if i am running her real hard she gets up to about 220 degrees i though posssible stuck t-stat and so i bought a 160 t-stat that didnt help i went as far as take the t-stat out completely that didnt help i think my fans arent pulling enough air flow anymore to keep it cool but im not sure i am thinking about going with 2 higher cfm fans to pull the air and also im planning on putting a seprate transcooler instead of having it run through the radiator and also a oil cooler do yall think any over this will help with keeping it cool thanks bryan0609

 

This is normal. Don't ever take a thermostat out, it runs the coolant too fast and won't let it sit in the radiator long enough to cool down. Put a higher psi cap on and put in a 190ish thermostat. Those cars are made to run hot. I don't think the fan even kicks on till 230. The low compression motors of that era were made to run hot, lean, and not so mean.

 

but see i have even hard wired the fans to come on instantly when i turn the key they come on and i know not to run with out a t-stat i was just tryin to see if my water pump wasnt pushing hard enough throw the stat to cool it

 

same problem here don't know what to do i have a 86 iroc and if i drive it for a long amount of time it over heats bad i mean mine will get above 220 bumpin the red im lost on were to start and now since it has started doin this it has picked upa miss drivin down the road so i dont know.. any ansawers?

 

any milky oil or oily coolant?

 

Make sure the air dam is still under the car. Major part of the cooling system on all 3rd gen cars in case you didn't know this fact..

 

thanks alot for the help i actaully dont have a air dam on there and dont know why but thanks for letting me know i ordered one yesterday so hopefully that helps thanks again

 

how old is the radiator? could be its pluged up. what shape are the finns? had that probem in my truck once and most of the finns on the radiator were gone. got it re-cored and solved it.

 

no its not my raditor checked and flushed it went throw fine and the fines are fine i work on ac and so the fins were the first thing i checked but thanks for trying

 

hey, not to be a thread stealer but i have 1 quick yes or no question.

Is my 305 in my 87 suposed to be really hot? like let it idle for 2-3 min and rev it a bit, and i wont even be able to touch the big rad hose its so hot, and opening the hood, its like a huge burst of hot air, my question is, is this normal?