03 cobra has overheating problems on hot days in traffic

[Banshee06]

I did water test when mine did just this...

get it hot at home..I assume just sitting at idle with ac on it will get past 1/2 on guage..

using tuner I watched temp go well over 220 before guage started to move in hot direction...

I used a garden on radiator..as air wasn't enough..

low and behold
..temp would drop to 180ish..

I replaced radiator..I see under 180 with ac on driving..200,210 in traffic.

but see temp fall fast when you do get to move..

100deg here most of the summer

I already replaced the radiator with a brand new fluildyne 3 row one and it made no difference.

 

[03cobra#694]

Turn the ac on, does the fan hit high speed?

 

[Banshee06]

Turn the ac on, does the fan hit high speed?

the fan turns on but I don't know if that is high speed.

 

[351stang]

High speed fan is noticeably louder. Almost annoying.

 

[03cobra#694]

the fan turns on but I don't know if that is high speed.

Come on. Let the car idle and wait till the fan kicks on, then hit the ac. You should hear the difference.

 

[Banshee06]

does anyone know where the Engine Cooling Fan Resistor is located on an 2003 Cobra so I can check it?

 

[Banshee06]

High speed fan is noticeably louder. Almost annoying.

Then I don't think the High speed is coming on because it isn't that loud.

 

[03cobra#694]

does anyone know where the Engine Cooling Fan Resistor is located on an 2003 Cobra so I can check it?

Someone linked it earlier in this thread I believe.

 

[Banshee06]

yeah is saw the resistor but not where it was located.

 

[03cobra#694]

yeah is saw the resistor but not where it was located.

I’m not trying to be a ass, but the internet is your friend.

 

[Banshee06]

I know I thought this was the internet and with informed people. If you don't want to help then ignore this post. Not everyone is a smart as you..

 

[351stang]

Here:

https://www.svtperformance.com/forums/threads/high-speed-fan-not-working.936721/

 

[03cobra#694]

Here:

That’s the same one I mentioned was posted earlier Scott.
If I can’t figure something out on my own. I look it it up, and don’t be a ass. I didn’t know where it was either, so I’m not that smart at OP.

 

[Black Gold 380R]

does anyone know where the Engine Cooling Fan Resistor is located on an 2003 Cobra so I can check it?

I think it's part of the fan shroud. I think I remember seeing it when I pulled the shroud out to change my pulleys.

Sent from my SM-G950U using the svtperformance.com mobile app

 

[Banshee06]

Thank you that is the answer I needed. Glad someone knows .

 

[351stang]

 

[DSG2003Mach1]

I’m pretty sure we wired up my mark 8 fan to be high speed any time it’s on.

The heat exchanger for the intercooler ingood shape? If it’s all mashed up and blocked up it’ll hurt flow.

You can always get one of those coolant testers to rule out a head gasket issue

 

[hotcobra03]

I already replaced the radiator with a brand new fluildyne 3 row one and it made no difference.

yes I did see that..but do the test anyway..

a basic compression test also..

I have had cracks in head 2 times causing overheating,found by basic compression test as low compression 140psi, machine shop found crack with there test..

 

[Banshee06]

I’m pretty sure we wired up my mark 8 fan to be high speed any time it’s on.

The heat exchanger for the intercooler ingood shape? If it’s all mashed up and blocked up it’ll hurt flow.

You can always get one of those coolant testers to rule out a head gasket issue

 

[Banshee06]

How do you wire it up to be on all the time?
I have a new fluiddyne heart exchange but it seems like it is always getting air bubbles and I having to prime manually to get it to work.