: Need a new fan



lincolncadillac
07-21-11, 07:30 PM
Need a new radiator fan for my 5.0 90 brougham.

Who make a good universal?

How hard would it be to switch to electric?

sven914
07-21-11, 11:26 PM
I've heard four-seasons is good (I've got a few bargain bin electronics from them that have lasted a while); clutch #36958. The Only other one, that I know of, that makes the clutch is Hayden (#2707), and I don't know anything about them.

As for converting to an electric fan, the main difficulty would be getting it to turn on at the correct time. Really any junkyard electric fan, that you can fit behind the radiator will work, but there are plenty universal fan kits you can get. A duel fan set up would be more worth while; have the primary come on at operating temperature and the secondary engage with the A/C

To control the fan, you need to have a temperature switch mounted in the bottom of the radiator, and have it send a signal to a 30 amp relay. The relay would basically connect the fans to direct battery voltage when it receives ignition voltage and a ground signal from the switch. I found pictures of this (home-built) wiring harness for a single fan system:

http://www.technovelocity.com/chevyhackers/tech_articles/dual_fans/wire_harness.jpg
http://www.technovelocity.com/chevyhackers/tech_articles/dual_fans/relay.jpg

To wire it for a duel fan, you would just run a 30 amp fused wire, from the compressor cutout relay to the other fan.

lincolncadillac
07-22-11, 12:10 AM
If i install the electric i will probably go with a toggle switch run to the inside of the car.

sven914
07-22-11, 12:26 AM
I personally would prefer an automated system. That way you never have to worry about overheating or a drained battery. But if you go with the toggle switch, you should also install a coolant gauge.

RocketFast321
07-22-11, 04:48 AM
I have 3800 regal fans. Summit, jegs, and others sell fan kits. From as low as $20.
http://www.jegs.com/c/Cooling-AC-Heating_Electric-Fan-Wiring-Kits-Senders/11471/10002/-1

Each fan has it's own relay and switch. Power for the switch is ran from the ECM fuse, and the fan power is ran to the back of the alt I got alot of relays out of one car at the junk yard for real cheap.

RocketFast321
07-22-11, 04:51 AM
http://www.technovelocity.com/chevyhackers/tech_articles/dual_fans/relay.jpg

To wire it for a duel fan, you would just run a 30 amp fused wire, from the compressor cutout relay to the other fan.

It would help if you could see the pin numbers IE 30,86,80

sven914
07-22-11, 12:47 PM
I don't know; the guy doesn't specify what pins are used for what.

But if you look at a basic 4-pin diagram it would make sense to wire it so that 30 goes to the battery, 86 goes to ignition switch, 85 goes to the temperature switch, and 87 goes to the fan.

http://www.reuk.co.uk/OtherImages/4-pin-automotive-relay.jpg

lincolncadillac
07-22-11, 11:00 PM
i will probably just go grab a fan blade from the junk yard and be done with it

RocketFast321
07-23-11, 12:22 AM
I don't know; the guy doesn't specify what pins are used for what.

But if you look at a basic 4-pin diagram it would make sense to wire it so that 30 goes to the battery, 86 goes to ignition switch, 85 goes to the temperature switch, and 87 goes to the fan.

http://www.reuk.co.uk/OtherImages/4-pin-automotive-relay.jpg

Very true, but some don't understand how a relay works.