Hi everyone,
I own a 1988 Pontiac Trans Am GTA, I have recently encountered cooling problems due to the fans not working properly. I had it checked at the mechanic and the engine for one of the existing two fans was rebuilt. I have not encountered overheating problems or any problem what so ever related to heating!
My question is, shouln't both fans work at the same time or even at separate times? I only seem to see one of them work, can't remember seeing the other work!

P.S. i would appreciate it if you guys could help out as i live overseas and mechanics seem to know as much i do!!

Thank you

 

From one of the Tech Articles...

General Motors engineered these cars to run HOT!! The primary coolant fan does not engage
until 222° F or higher (depending on year and engine) and the secondary fan until 243° F! It’s
been shown that at these high temperatures, air and fuel burn more completely and therefore
producing less hydrocarbons.

https://www.thirdgen.org/electric_co..._spec_mod_dual

 

The 2 fans are independent. Primary is controlled by the ECM, secondary is controlled by a switch in the passenger side head. Change that switch in the head to Standard Motor Products part #TS85, and the secondary fan will come on at a more reasonable 211 degrees. That will make it come on after sitting at a red light for a few minutes, then it will turn off shortly after you get underway. Perfect.

 

I own a 1990 c1500 tbi 350 it has a clutch fan I was wanting to get rid of it and get electric one bc of all that excess noise. Anyone have a idea of what size or cfm I'll need for this swap. Or if any universal one will fit? Any feed back is greatly appreciated!