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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 81chevyskullc10 on November 08, 2011, 09:22:58 am

Title: fan question?
Post by: 81chevyskullc10 on November 08, 2011, 09:22:58 am
I have an 81 Chevy with 305. when the truck is running, should the fan be blowing pulling air through radiator not pushing? when I am standing outside the truck it is pushing air through, found this kind of strange ? Any help would be great!!
Title: Re: fan question?
Post by: Captkaos on November 08, 2011, 11:02:35 am
what kind of fan?  Thermo, fixed, electric...  (you need to include more info in your posts...)
If the fan is thermo switched, it won't be running unless the engine reaches a certain temp. 

Regardless of type, the fan should be pulling outside out into the engine compartment.  Do you have a shroud on it?
Title: Re: fan question?
Post by: bake74 on November 08, 2011, 12:29:11 pm
what kind of fan?  Thermo, fixed, electric...  (you need to include more info in your posts...)
If the fan is thermo switched, it won't be running unless the engine reaches a certain temp. 

Regardless of type, the fan should be pulling outside out into the engine compartment.  Do you have a shroud on it?

     x2:  more info.  Side note, if you did have the mech. fan on and it was blowing from engine compartment to front of truck, that would be something to see.
Title: Re: fan question?
Post by: 81chevyskullc10 on November 08, 2011, 01:41:22 pm
sorry gang for not having enough info. It has a clutch fan with a shroud. even my neighbor said that was weird. shocked the heck out of me to. I have always know the fan to be sucking in and you get a lot of air around your motor if you put your hand in there, its crazy how much air comes out the front lol
Title: Re: fan question?
Post by: 1979C20 on November 08, 2011, 02:16:34 pm
When my truck is sitting I can feel air coming out the front. Snap a picture of your fan with the engine off and post it on here. Maybe someone installed the fan with the blades backwards, or maybe the fan is for a reverse direction waterpump.
Title: Re: fan question?
Post by: 81chevyskullc10 on November 08, 2011, 03:47:13 pm
its raining, i will try to get one when it stops
Title: Re: fan question?
Post by: 81chevyskullc10 on November 09, 2011, 05:01:15 pm
i figured it out, going to get a flex fan on saturday. There is a clutch fan on it and it is not the right one. thanks guys
Title: Re: fan question?
Post by: Captkaos on November 09, 2011, 05:40:12 pm
Not the right one how.  Flex fans are not worth it, replace it with a proper clutch fan.