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coupe's Avatar
 
Join Date: Oct 2002
Location: Dubai
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which way to the cooling fans turn?

My car seems to get warmer as it is driven, and then at idle, at a traffic light the temperature returns to normal. I wonder if the cooling fans are turning in the right direction, drawing air,through the radiator, instead of pushing it through.

So can any of you tell me , if one stands infront of the car, which direction do they turn?
Thanking you in advance
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coupe

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Porsche 944 Turbo, 1986
Fiat Coupe 20v Turbo, 1997
Old 04-07-2003, 09:57 AM
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Ornery Bastard
 
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I'm not sure about the direction they turn, but they are supposed to pull air from the front of the radiator to the back. The setup of the blades and the knowledge that the air is supposed to be pulled towards the back of the car should be enough to let you figure out what the direction of rotation is.

How hot does it get? If you're doing city driving, (35 mph and under) then it's the fans that do most of the work. As a very general rule, you need to be going faster than 30-35 mph in order to surpass the airflow generated by the fans.

Aaron
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Old 04-07-2003, 02:07 PM
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My thoughts exactly. The fans draw air from the front of the car, through the radiator, to the back. I just have this gut feeling that the wires may be crossed, and the fans are turning the wrong way.
I'll have to trouble shoot some more.
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coupe

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Porsche 944 Turbo, 1986
Fiat Coupe 20v Turbo, 1997
Old 04-07-2003, 10:21 PM
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I believe (75% sure) that they turn clockwise. (or from the front of the car, anti-clockwise)

Could have also sworn that the connectors were one way to prevent them fron getting crossed.

Does your car have a catalytic converter?

AFJuvat
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Old 04-07-2003, 10:57 PM
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Hi AfJuvat. I have just been experimenting here at work with some fans, and what you say is right: anti-clickwise if standing in front. The car does not have a cat. Dont know if it ever did. I'll check on the car tonight.
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Porsche 944 Turbo, 1986
Fiat Coupe 20v Turbo, 1997
Old 04-08-2003, 04:16 AM
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I dont believe it, my fans are turning turning clockwise, when I stand in front of the car..This may explain the cooling problem.
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Porsche 944 Turbo, 1986
Fiat Coupe 20v Turbo, 1997
Old 04-14-2003, 05:52 AM
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Quote:
Originally posted by coupe
I dont believe it, my fans are turning turning clockwise, when I stand in front of the car..This may explain the cooling problem.
Check how the blades are oriented. If you reverse the pitch of the blades, then the fan can be turning clockwise and still be pulling air from the front.

Aaron
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Shifting is an art. Learn it, love it, live it.
---------
Silver 1998 Volvo S70 T5 <- Daily (Anja)
Guards Red 1986 951 <- Seattle car (Gretchen)
White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei)
Old 04-14-2003, 08:40 AM
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You guys are working way too hard on this one. With the car running a/c on(fans on), see if a piece of paper gets sucked up to the front of the a/c condensor(behind the front spoiler. If it sticks, the air is flowing in the right direction, if it blows it fwd., it's not.
Old 04-14-2003, 11:19 AM
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BTW? How would you reverse the "pitch" of the blades?
Old 04-14-2003, 11:20 AM
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Quote:
Originally posted by highboost951
BTW? How would you reverse the "pitch" of the blades?
Well, if the blades are slanted one way, then counterclockwise will "push" and clockwise will "pull". If the blades are slanted in the opposite direction, then colckwise will "push" and counterclockwise will "pull".

Aaron
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Shifting is an art. Learn it, love it, live it.
---------
Silver 1998 Volvo S70 T5 <- Daily (Anja)
Guards Red 1986 951 <- Seattle car (Gretchen)
White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei)
Old 04-14-2003, 12:36 PM
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I understand that principle, but since they only mount one way that would be pretty difficult to do.
Old 04-14-2003, 12:41 PM
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Quote:
Originally posted by highboost951
I understand that principle, but since they only mount one way that would be pretty difficult to do.
Yeah, but when I was looking at my fans today (the end result being its own catastrophe, yay, see thread) I noticed that the blades are set up for the fans to spin clockwise when viewed from the front of the car. Different suppliers might have had different blade setups. Or maybe my car is just fugged up. The second explanation seems most likely.

Aaron
__________________
Shifting is an art. Learn it, love it, live it.
---------
Silver 1998 Volvo S70 T5 <- Daily (Anja)
Guards Red 1986 951 <- Seattle car (Gretchen)
White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei)
Old 04-14-2003, 12:59 PM
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Let's go shooting.
 
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Look chaps, it's perfectly simple - stick yer least favourite digit in the fan and see which side of your finger bleeds.
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Old 04-14-2003, 02:51 PM
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