attacking a clutch fan

[Barry Donovan]

I needed to remove my newer engine clutch fan, it was stuck in an on mode. they never work exactly..but full on in my car is .5 times faster than the crank. 7000 rpm engine..yikes. the plastic baldes could fly like a connecting rod through an ea82.

I got a tip for veggie oil,half a cap..this keeps the silone oil from gaining weight. the fan I replaced with is a 1993, from an 84hp engine, it has always been a gentle one.

is the veggie oil advice good?


the clutch fan was real active. So I took my 1993 version, heated blades to better than it was in good shaping..a bic lighter does the trick. cold water for several minutes to cool the plastic down.


for the clutch I added a half cap of veggie oil, put it right back together. easy going as ever..this equals better fuel mileage, a little more alternator, faster warm-ups..faster take off..and no dust storm behind me.

As it turns out, as long as there is fluid in the clutch, the centrifugal forces get a use out of it. My little engine had to have this for red lights/hill stopped locations in the summer city. I simply give above idle throttle, and there is plenty of fan..but can’t here it going 1 to 1 rpm...because it cannot.

Exactly what I wanted. I only need to set a flow, throw a breeze at the billet oil filter (cooler)..the hills and stopped are the worst. Although a traffic jam on the highway when it is 90F in the shade is a good use as well.

[Barry Donovan]

to answer my own thread..
I guess this works perfectly.
wesson oil or nice grade veggie oil gets it. pretends to be aerated then disappears into a mix of 1 fluid. thinner of course

there is replacement silica fluids.. toyota etc.. they even lable them for small cars to big. heavyweight is big.
model rc cars use it in ther little diffs.

since ripped into the one acting like a tractor trailer. Simply brown thick old silicone fluid. half a cap of wesson, back together. thinned right out. Now I have two of these costly gadgets.

once upon a time that was 800 dollars for the two fans. I like them, gives it as it needs it..half time is still bigger than electric.

[Barry Donovan]

update

I have since decided to kill off all the theory they got in a clutch fan, the function bimetal temp sensor with the silicon oil diaclectric grease oil working magic tricks in the lab that created it and nowhere else. I left it all as they made except for the oil inside...I took that out. never used water as an option to clean it.

I simply added valvoline high temp synthetic grease, keeps the same exact resistance and slip through to 8k rpms. hardly a change, can't hear it spooling to supercharger territory, as it does not go there...no doubt less than half rpm, and it is plenty.

the danger is at 5k rpm the fan is spinning over 10,000 if at a 1 to 1, the pulley is very small it is bolted to. maybe even a 3 times to 1 spin of the crank. that would put the fan at 15,000 rpm if to grab a grip and spin at pulley speed.
the high grade grease won't ever allow it, and it still does keep a gentle breeze going.

the real purpose for hacking is stopping the electrical monster they got built into it. I have concluded it is the source of lightning strikes. the grease is meant to be the opposite of an electric carrier. just going to go with that. that is why I chose wheel bearing/chassis synthetic grease.

shamefully very nice fans, concentric perfection...will be making them work, and slower than 1 to 1 ratio. cools all pumps, and even the steering track.

[CDMBill]

Sometimes the right answer is get rid of the clutch fan. I love your technical investigation, but in this case you may be chasing an optimized version of a mediocre concept.

[Barry Donovan]

Sometimes the right answer is get rid of the clutch fan. I love your technical investigation, but in this case you may be chasing an optimized version of a mediocre concept.

on an 84 hp engine, mediocre is huge.


ever messed with a fan on an airplane engine? they don't stop with silicone oil theories. A dial into concentric instead of the slow out. Superslicked timing pulleys still work their way to supercharger whines. Trying to be civilized. the slicked up fan is doing good. anti magnetic stuff etc etc etc.

I thought of the flex blades one can lightweight...this engine would flatten them out and keep them there.

stopping fan entirely proved to be bursts of pig at the chassis. needs something at all times, gentle is quite alright.

I have since gone at this again. I found after tearing into the last one, a day or so.. and leaving it in the house..a smell of a hospital or jail was coming out, after using the grease. I then took it apart and went for sterile, after toluene dissolving the silicone oil. for some odd reason, red dye came out of some of the interior aluminum, I ponder blood. The smell of dyssentary, a few drops of lime green (antifreeze), and some red the color of blood.

I then rinsed with boiling water, stuck it in the parts oven on fan bake, 250F. Finally back together with the grease a little more full this time, utilize what little synthetic may need to expand, to speed up the fan.. No extra games. just right as of now. I also threw out the gasket, made my own.