ok i have read most of the overheating threads and tried everything .. i got a 1988 gta 5.7 tpi it was all fine till i took it on a long ride .. now i cant seem to get it to stop over heating .. i put in a new 180 thermastat fan still did not work so i tested the switch it was good relays was good so i wired the fans to a switch but the car is still over heating .. it just had a head job last year there is no oil in the watter or watter in the oil so i know thats all good .. its not leaking nowhere it just gets hot and boils into the overflow tank even with the fans on the blower motor dont work and the ac would not even kick the fans.. any help i would be helpfull or if there is someone close to ottawa il the could help me would be even better befor i inup junking this nice car


here is the car

here is the motor

 

Take the radiator to a shop or buy a new one. While you have it out, take a good close look at the A/C condenser. After you've looked at it for awhile, start picking all the bugs, pebbles and other assorted crap out of it.

 

When I replaced the radiator due to a cooling problems and a leak . What shocked me more then the leak was the fins behind the A/C condensor. The fins were completely blocked with gunk built up over the years and I estimate the loss of cooling area to be well over 30 %. Now with the new radiator, I am running normal temp (180 deg) and 20 deg cooler with the A/C on.

This blockage was in a area that cannot be seen in a normal inspection and just washing with a hose would not have cleared it.

 

cool guys i will give it a try

 

i want to thank you guys for all the help its back up and running once again and all it really was is the battery lead wire to the fans was bad so its all good now thanks again