convert viscous belt fan to electric fan

**rion** · May 14th, 2007 10:49 AM

just wondering if any tsikoteers have experienced converting belt-driven clutch fan to electric fan.

did it gain additional power? and did the engine run cooler?

and also, has anyone put an electric pusher fan in front of their radiator and yet still left the standard viscous fan in place?

**speedyfix** · May 15th, 2007 11:31 PM

you will gain power because there is less load on the engine. but the clutch fan can theoretically cool better because it speeds up as the rpm goes up.

i've put a push fan on my car but that was just to aid in a/c cooling which suffered after the intercooler went in.

**alwayz_yummy** · May 16th, 2007 09:46 AM

in inspection sa surplusan, pano po mo malalaman kung fan ay mount front or back ng radiator? pag pinatakbo ba?

diba pag electric na yung fan, mas constant na ang rpm nun than sa clutch fan na connected sa engine?

**utk505** · May 16th, 2007 08:14 PM

Originally Posted by alwayz_yummy

in inspection sa surplusan, pano po mo malalaman kung fan ay mount front or back ng radiator? pag pinatakbo ba?

depends on the blades rotation

diba pag electric na yung fan, mas constant na ang rpm nun than sa clutch fan na connected sa engine?

right , pero mas malakas parin ang clutch fan

**rion** · May 16th, 2007 08:41 PM

I notice that our belt driven fans has limit speed. nag freewheeling nalang siya...

I have no plans right now, but just wondering how do you remove it? it's not as easy as removing the fan right? I mean removing the blades will still consume power unless you have to do something about the belt and other connections right?

**kinyo** · May 16th, 2007 09:28 PM

removing the blades would have practically elimated the fan as a load on the engine

for an electric driven fan, you might need to install a thermostat switch so that the motor will not have to run continuously, otherwise it would not last long and the carbon brushes of the motor would need replacement regulary as well as its bearings

in some cars, the fan motor is not powered at all when the car is at some speed where wind speed is enough to cool the radiator and the thermostat stays at "off" state

**Yoda** · May 17th, 2007 09:46 AM

I notice that our belt driven fans has limit speed. nag freewheeling nalang siya...

That's normal if the engine is cold. Try running the engine to its operating temperature, then shut it down. The fan shouldn't be "free-wheeling" at this point if your viscous coupling is still intact.

I have no plans right now, but just wondering how do you remove it? it's not as easy as removing the fan right? I mean removing the blades will still consume power unless you have to do something about the belt and other connections right?

It should be. You can't reroute the belts and leave out the fan gear since that one's also connected to the water pump.

**rion** · May 17th, 2007 08:13 PM

Originally Posted by kinyo

removing the blades would have practically elimated the fan as a load on the engine

for an electric driven fan, you might need to install a thermostat switch so that the motor will not have to run continuously, otherwise it would not last long and the carbon brushes of the motor would need replacement regulary as well as its bearings

in some cars, the fan motor is not powered at all when the car is at some speed where wind speed is enough to cool the radiator and the thermostat stays at "off" state

I see thanks.

is there a thermostat with adjustable temperature switcher available localy? I also want to put one in my van's intercooler. manual kasi yung switch...

Originally Posted by Yoda

That's normal if the engine is cold. Try running the engine to its operating temperature, then shut it down. The fan shouldn't be "free-wheeling" at this point if your viscous coupling is still intact.

It should be. You can't reroute the belts and leave out the fan gear since that one's also connected to the water pump.

that figures. sometimes, medyo iba yung tunog. yung fan pala ang nag-turn on-off. thanks.

I just thought since the main fan has two belts. maybe there is a way to make it one belt or something making it more lighter.

how about adding a pusher fan? since belt driven fan has a on-off pala, where in heavy and hot traffics, or vans with no much airflow since radiator is under the driver seat. will it make the belt fan on free-wheeling state most often? giving the engine a lighter load?

**Yoda** · May 17th, 2007 09:04 PM

Originally Posted by rion

I just thought since the main fan has two belts. maybe there is a way to make it one belt or something making it more lighter.

Two belts? Never seen such a setup. Disregarding the aircon compressor and the power steering pump, it's usually just a single belt looping through the crank, alternator and water pump, forming a triangular drive. The gear on the water pump attaches to the fan also, so the same gear drives both devices.

Pano ba yung pagkaka-layout nung sa yo? Care to describe it in detail or post a pic?

Originally Posted by rion

how about adding a pusher fan? since belt driven fan has a on-off pala, where in heavy and hot traffics, or vans with no much airflow since radiator is under the driver seat. will it make the belt fan on free-wheeling state most often? giving the engine a lighter load?

Usually, nilalagyan ng pusher/auxiliary fan to augment the main fan, eg. the latter is too weak to provide sufficient cooling. If you're sure the aux fan can cool the engine by itself, then you can probably remove the main fan para wala na talagang load sa engine mo. Just make sure, as others have already stated, that you install a thermostatic switch on the electric fan so it's not always in operation.

HTH.

**rion** · May 17th, 2007 10:12 PM

Originally Posted by Yoda

Pano ba yung pagkaka-layout nung sa yo? Care to describe it in detail or post a pic?

this is the best angle that I could take...

the source has 4 belts. the main fan with the water pump has 2 belts, then connected to the alternator (2 belts too). 1 belt each for aircon and power steering.

looks like hindi nga dapat galawin yung belts kahit dalawa no? maybe the parts related to on-off belt fan should be touched instead?

Originally Posted by Yoda

Usually, nilalagyan ng pusher/auxiliary fan to augment the main fan, eg. the latter is too weak to provide sufficient cooling. If you're sure the aux fan can cool the engine by itself, then you can probably remove the main fan para wala na talagang load sa engine mo.

medyo takot pa po ako sa removing main fan ngayon.

I just want to learn for future plans. hehe...

the least I can do now siguro is lagyan nalang ng Aux/pusher fan in front IF IT WILL REALLY make the belt fan on free-wheeling mode in most times...

what do you think po?