Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Radiator fan front or back ?

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Old Aug 6, 2012 | 08:30 PM
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Default Radiator fan front or back ?

Hey guys i just noticed that my radiator fan is in front of the car, is that normal. I noticed it blows really hot air in my engine when the fan is on. My engine seems to be really hot, it runs fine though.




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Old Aug 6, 2012 | 08:33 PM
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Default Re: Radiator fan front or back ?

Does the fan pull air from the front of the car toward the engine? If so, at least it's blowing in the right direction.

What does the cluster temp gauge read?
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Old Aug 6, 2012 | 08:36 PM
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Default Re: Radiator fan front or back ?

Yes it blows hot air in the engine. Should i turn it around ?
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Old Aug 6, 2012 | 08:37 PM
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Default Re: Radiator fan front or back ?

My tempature is fine right in the middle always. (when its hot)
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Old Aug 6, 2012 | 08:38 PM
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Default Re: Radiator fan front or back ?

That's the correct direction for air flow. I assume the fan was placed outside the radiator due to space restrictions?
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Old Aug 6, 2012 | 08:46 PM
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Default Re: Radiator fan front or back ?

Ok thanks man, ill just turn it around the right way.
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Old Aug 6, 2012 | 09:38 PM
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Default Re: Radiator fan front or back ?

Originally Posted by 56K_EM1
Ok thanks man, ill just turn it around the right way.
you will have to redo the wiring also, to make the fan spin the opposite direction. air is supposed to flow from the front into the engine bay
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Old Aug 6, 2012 | 10:22 PM
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Default Re: Radiator fan front or back ?

Originally Posted by 56K_EM1
Ok thanks man, ill just turn it around the right way.
The fan is already on "the right way". Front or back mounted doesn't matter - all that matters is which direction it's pulling/pushing air. It isn't broken; there's nothing to fix.
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Old Aug 6, 2012 | 10:43 PM
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Default Re: Radiator fan front or back ?

Originally Posted by jbpnoman
The fan is already on "the right way". Front or back mounted doesn't matter - all that matters is which direction it's pulling/pushing air. It isn't broken; there's nothing to fix.

Thanks for the help everyone.
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Old Aug 6, 2012 | 10:56 PM
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Default Re: Radiator fan front or back ?

You have to switch the fan to "push" instead of pull...


Most of the time people swap fans to the outside to simply clean up the look of the bay. As you can see, there should/is plenty of clearence for the fan to sit there.
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Old Aug 6, 2012 | 11:12 PM
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Default Re: Radiator fan front or back ?

Originally Posted by 98civdx
You have to switch the fan to "push" instead of pull...


Most of the time people swap fans to the outside to simply clean up the look of the bay. As you can see, there should/is plenty of clearence for the fan to sit there.
I got the radiator like this with fan mounted in the front.
Not really sure if I should leave it or switch sides.
It's working fine, besides blowing hot air on
The engine.
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Old Aug 6, 2012 | 11:33 PM
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Default Re: Radiator fan front or back ?

Originally Posted by 56K_EM1
I got the radiator like this with fan mounted in the front.
Not really sure if I should leave it or switch sides.
It's working fine, besides blowing hot air on
The engine.
Blowing hot air into the engine bay is the correct way, regardless of if it's front- or rear-mounted. Think of it this way - if you're driving at highway speeds, do you really think that little plastic fan is going to keep up with the amount of air flowing through your grille?

As for keeping an engine cool while blowing hot air on it (I know, it's an odd conundrum). Radiators, as well as coolant, are made with the specific design intention of transferring heat from the coolant into the surrounding air. Radiators and coolant are much better at this than the front of a motor or transmission, so while they can soak up residual heat from the radiator, the radiator is "bleeding off" the heat a lot faster than the motor can suck it back up again.

Thermodynamics gogo!
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Old Aug 6, 2012 | 11:38 PM
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Default Re: Radiator fan front or back ?

I never seen this, looks nice tho!
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Old Aug 7, 2012 | 06:26 AM
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Default Re: Radiator fan front or back ?

Some cars were designed to have the fan on front of the radiator and push air towards the engine. Our civics were designed with the fan at the back of the radiator and pull air from the front towards the engine. This is the better design, performance wise but sacrificing space. When your cruising, wind from the front hits the radiator with less obstruction compared to a front mounted fan having the same size of blade and shroud. The fan you got by the way is designed to suck air (based on the curve of blades) and should be mounted after the radiator. You would notice more air movement and less noise. You would have to interchange the + & - wires to make it pull air.
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