Overheating even with new rad fans.. Ideas?

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Overheating even with new rad fans.. Ideas?

Postby 91Atrac » Thu Sep 24, 2015 9:51 pm

Overheating after awhile of traffic. It killed my car today. Car won't start.

Anyone have ideas. Thermostat is a trd one and it might be the rad cap an issue.

Also thinking it's the heater core causing the problem. Anyone please help
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Re: Overheating even with new rad fans.. Ideas?

Postby Killtodie » Thu Sep 24, 2015 9:55 pm

did you bleed the system?
any leaks?
do you get hot air?
does running heat lower engine temps?
are the fans decent? not ebay crap that have 1/4th the CFM

Use a stock temp thermostat
bleed the air out of the system

car not starting is a common issue in the Celicas, the 12V line gets heat soaked and does not send a strong enough signal to start the car. Solution is to install a rely, wrap the wire in insulation, or just keep it cranked for 30 seconds, if it doesnt star, pop the hood and let it cool off for 5 minutes.
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As seen on YouTube https://www.youtube.com/watch?v=YIY4wuwc8XA
1988 Toyota Celica All-Trac
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Re: Overheating even with new rad fans.. Ideas?

Postby 91Atrac » Fri Sep 25, 2015 12:04 am

Bleed no
Leaks no
Hot air in the car.... When it wants to which is nearly never
Fans are mishimoto electric slim fans
I'll put the stock thermostat back
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Re: Overheating even with new rad fans.. Ideas?

Postby Killtodie » Fri Sep 25, 2015 12:19 am

91Atrac wrote:Bleed no
Leaks no
Hot air in the car.... When it wants to which is nearly never
Fans are mishimoto electric slim fans
I'll put the stock thermostat back



Sounds like you have air in the system.
1988 Chrysler Conquest
As seen on YouTube https://www.youtube.com/watch?v=YIY4wuwc8XA
1988 Toyota Celica All-Trac
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Re: Overheating even with new rad fans.. Ideas?

Postby Awesome-Trac » Fri Sep 25, 2015 3:25 am

I had these same problems! I replaced pretty much the whole cooling system with a aluminum Radiator, 170 degree lower temp thermostat, water pump, two 12" slim fans and bled the system of air
-1988 Celica Alltrac (white) Sold
-1988 Celica Alltrac (black) new project
-1990 Corolla sedan (sky blue) totalled by my brother :(
-1990 Celica GT-S hatchback (sky blue) daily driver

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Re: Overheating even with new rad fans.. Ideas?

Postby zaluss » Fri Sep 25, 2015 3:43 am

91Atrac wrote:Overheating after awhile of traffic. It killed my car today. Car won't start.

Anyone have ideas. Thermostat is a trd one and it might be the rad cap an issue.

Also thinking it's the heater core causing the problem. Anyone please help


I would be concerned that you blew the headgasket if you let it overheat to the point of dying. I did that with my ol 89' GT.
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Re: Overheating even with new rad fans.. Ideas?

Postby underscore » Mon Sep 28, 2015 3:57 am

One other thing is make sure you wired the fans the right way, if you have them blowing backwards the air can't flow through the rad.
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