Cooling fan operation

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07-20-2012, 01:04 AM

#11

843de

Deceased

Join Date: 06-30-2010

Location: Kannapolis NC

Posts: 25,739

Quote:

Originally Posted by whopper

..... Waiting to see if someone posts a question asking if the speed can be overridden so that the fan runs at 100% to help pull the car through the air faster - sorta like a turbo fan thing.............. Over to you Bigjacksauto ;-)

Did a few quick and dirty calculations based on the approximate 1/3 hp developed by the cooling fan motor on an HHR, with the fan diameter and pitch also factored in.

On a "Standard Density" day (Density (ρ): 1.229 kg/m³-Pressure (p): 101.3 kPa-Temperature (T): 15 °C-Viscosity (μ): 17.3 µPa·s), the fan will develop approximately 7.63lbs of thrust at 1,725 rpm.

Not enough to matter really, now bolt a P&W J-58 Turbo-Jet on the roof, that's another matter entirely.

07-20-2012, 01:10 AM

#12

SS fan

Premium Member

Join Date: 10-09-2010

Location: Tacoma

Posts: 14,420

You got a part # on one of those, would it fit under a cowl hood ??

07-20-2012, 01:17 AM

#13

843de

Deceased

Join Date: 06-30-2010

Location: Kannapolis NC

Posts: 25,739

I don't think room under the hood would be an issue, it won't fit, and you might burn the paint off the guy's car behind you.

That 32,500lbs of thrust and 160,000 horsepower at work there, simply awesome!

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07-20-2012, 06:42 PM

#14

Mr Z

Member

Join Date: 10-25-2008

Location: NE

Posts: 31

Quote:

Originally Posted by Vcode455

Can anyone tell me what temp the cooling fan is supposed to come on at? Mine seems to run almost continuosly. 2009 SS Auto with GMTU. Watching the digital temp, it runs between 190 and 198. Fan seems to always be on when I am stopped, even with the A/C off. I can let it run at idle and it does not turn off, even after a run on the highway with outside temps around 80. Is this normal?

I wish mine would stay that cool.

07-24-2012, 10:08 AM

#15

ChevroletCustomerService

Senior Member

Join Date: 11-05-2010

Location: Detroit, Michigan USA

Posts: 1,492

Quote:

Originally Posted by Vcode455

Actually, Michelle answered my question. Thanks Michelle!

My resources have informed me that your vehicle with the 2.0 turbo engine has the fan that will run all the time. The fan speed is controlled at between 10% and 94% (high speed) so the speed will vary but it may never shut off completely. This is different than the non- turbo engine which will actually turn off at times.

You're VERY welcome!!! It was a huge pleasure to help out with this. Please, don't hesitate to contact me in the future.

Michelle, Chevrolet Customer Service