Cooling problems!!!!
Thread Starter
Junior Member
Joined: Sep 2009
Posts: 7
Likes: 0
From: Illinois
Car: 1988 Trans Am
Engine: 305 TPI
Cooling problems!!!!
I have a 1988 trans am 305 TPI. The fans Stopped working properly and it overheated and split the radiator. Will it cause computer errors if i put a manual override on the fans. Also whaqt is a recommended pressure of the radiator cap?
Supreme Member
Joined: Apr 2006
Posts: 4,482
Likes: 9
From: Northern, CA
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Cooling problems!!!!
I beleave the cap is 16psi.Thats what Napa auto parts sold me for my car. So that's what I run on mine. By the way I also run a 200 degree fan switch where the 225 stock switch was and a manually switched axillary pusher fan in front of the radiator with a 180 degree thermostat .Just a few things to keep her under that 225 mark. IMO that's way to hot. Mine stays around 190.
Last edited by Ron U.S.M.C.; Nov 17, 2009 at 01:40 AM. Reason: add info.
Supreme Member
Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Cooling problems!!!!
No - no computer issues with a manual switch. In fact, you can ignore the factory fan switch and install a seperate fan controller if you like - I did 'cause I never liked the factory switch. Most are fully adjustable, easy to wire, and best of all, no coolant in the face to install - they probe the radiator instead of getting installed in the head or block.
The ECM senses temps from the sensor on the water neck, or from the sensor on the driver side, and the ECM will make adjustments to engine according to the temp sensed.
The ECM senses temps from the sensor on the water neck, or from the sensor on the driver side, and the ECM will make adjustments to engine according to the temp sensed.
do you know where the factory temp switch is because i may try to replace it . 
Junior Member
Joined: Oct 2009
Posts: 6
Likes: 0
From: phoenix,az
Car: 92 camero rs
Engine: 305 tbi searching for 5.3
Transmission: t5 wanting a t56
Axle/Gears: b/w 9bolt
Re: Cooling problems!!!!
where did you find an aftermarket switch and your fan is pushing, meaning air is flowing towards the front of the car with the fan on the motor side of the radaitor?
Junior Member
Joined: Oct 2009
Posts: 6
Likes: 0
From: phoenix,az
Car: 92 camero rs
Engine: 305 tbi searching for 5.3
Transmission: t5 wanting a t56
Axle/Gears: b/w 9bolt
Re: Cooling problems!!!!
I beleave the cap is 16psi.Thats what Napa auto parts sold me for my car. So that's what I run on mine. By the way I also run a 200 degree fan switch where the 225 stock switch was and a manually switched axillary pusher fan in front of the radiator with a 180 degree thermostat .Just a few things to keep her under that 225 mark. IMO that's way to hot. Mine stays around 190.
where did you find an aftermarket switch and your fan is pushing, meaning air is flowing towards the front of the car with the fan on the motor side of the radaitor? I live in phoenix were its pretty hot in slow traffic can i get an even lower degree of fan switch
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Supreme Member
Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Cooling problems!!!!
He's saying that he has the stock puller fan on the motor side with a lower temp switch, AND he has an aftermarket pusher fan on the front side of radiator with a manual switch on it that pushes air towards the motor.
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