Can a clutch fan be re'coed.

So I took out my fan today as it was not working. (Had the same resistance when hot as when cold). I was about to do what Parksey had done with his when I noticed that the clutch had the 4 bolts holding the fan in.

Attachment 56048

So I removed them and the fan.

Attachment 56049

Attachment 56050

And on the other side there was another 4 bolts that held the 2 pieces together. So I removed them as well.


Attachment 56051

Attachment 56052

And this was the result.


Attachment 56053

So my questions are:
Can I get the oil/silicone to refill it.
Am I right in assuming that if the resistance is the same when hot as it is cold it means it is not working properly.
If I can get the oil where do I get it and what is it.

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The oil is silicone oil. People use it to lube up the belts on walking machines. Memory says it was $20 for 50ml off ebay. 50ml is a good amount. Pour it over and bolt together again.

i've heard it was at least for sale a few years ago, but most of the time they just get replaced. don't have a clue other than try someone like repco or bursons ect

As far as I know you can get it at Toyota.

Quote:

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Originally Posted by jay see

As far as I know you can get it at Toyota.

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Will that help it work or make it worse. Lol

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Quote:

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Originally Posted by krbrooking

Will that help it work or make it worse. Lol

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Yeah, well :confused:
Probably better to buy a aftermarket replacement, Nissan one.

Def get it from Tojo, did mine about a year ago.

Attachment 56090 Is this the stuff. Because this stuff is clear and the stuff in the unit is brown and quite thick and claggy/tacky.
Is that from years of use it is mine different stuff???
Please excuse my ignorance.
I have also spoken to two ex mechanics that I work with and they both said they have never heard of anyone opening them up and refilling them????
How much will I need as well, as I don't think 50ml will be enough.


Thanks in advance.

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pretty sure that isn't it, some can be refilled but it just isn't really worth the time and effort to save a little and u need to find out how much is required, personally i'd just buy a replacement hub, then you know its right.

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Originally Posted by garett

pretty sure that isn't it, some can be refilled but it just isn't really worth the time and effort to save a little and u need to find out how much is required, personally i'd just buy a replacement hub, then you know its right.

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What he said.

That's the stuff I used.

Quote:

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Originally Posted by P4trol

That's the stuff I used.

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Did it fix your prob.
How much did you use.

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I'd be interested in how you go Kev, been thinking about doing similar to mine soonish. I put a new clutch fan hub on when I did the conversion, but seems to be engaged most of the time when it probably shouldn't (don't have any overheating issues or doesn't run hot). I know this is good for cooling, but they are bloody noisy and sap a little power. This sounds like it's probably the opposite to what yours is doing, but would be keen to see if they can be reconditioned / adjusted to work as they should. I think this is defiantly worth perusing as opposed to just putting on a replacement.

Good luck, let us know how you get on.

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Originally Posted by Rossco

I'd be interested in how you go Kev, been thinking about doing similar to mine soonish. I put a new clutch fan hub on when I did the conversion, but seems to be engaged most of the time when it probably shouldn't (don't have any overheating issues or doesn't run hot). I know this is good for cooling, but they are bloody noisy and sap a little power. This sounds like it's probably the opposite to what yours is doing, but would be keen to see if they can be reconditioned / adjusted to work as they should. I think this is defiantly worth perusing as opposed to just putting on a replacement.

Good luck, let us know how you get on.

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I did mine just over a year ago. I bought a tube of the fan hub fluid from Toyota (it's a genuine Toyota part) and it made a huge difference. Works just as it should now and solved my problem.

I used all of it. It's slowish to flow, and you spread it around the circular grooves.

If you have trouble finding the stuff, use shock absorber fluid used in RC cars. eBay or most hobby shops sell it. By memory i used 30k stuff. Was very thick. This is silicon oil.

It's available over the counter at ant Toyota dealer. It's cheap as chips. You will need 2 tubes. Works a treat. I have the part number if you need it but you won't. Stop on at your local and ask for viscous fan silicon.

Will do Rossco.

Yeh I think I will give it a go as the cheapest replacement hub I have found is over $100 most over $300. So for the sake of all of an hours work and some $15 od silicone oil it is a way better option.

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Hey anyone that has done it how much do I need. As I think it will be crucial to get the right amount. So as it expands and contracts it will need to be the right amount to do the job properly. Too much or not enough and it will be pointless.

Just re-read your post Dazz will I use the full amount of both tubes.




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Quote:

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Originally Posted by krbrooking

Hey anyone that has done it how much do I need. As I think it will be crucial to get the right amount. So as it expands and contracts it will need to be the right amount to do the job properly. Too much or not enough and it will be pointless.

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Thats not how a viscous clutch works.
The fluid doesn't expand and contract.

The clutch works by porting fluid using a thermal spring to increase or decrease drag.
The more fluid on the clutch side the more friction to drive to the fan
The less fluid on the clutch side the less drive to the fan
With the porting all the way open IE fan clutch bimetallic spring sensing above about 80 degrees the fan should spin at better than 50% of the belt driven coupler.
That varies in the rating of the cluth tho, some may be as high as 85%.

Things are a little different on start up initially but that isn't a biggee

A viscous coupled fan has two disadvantages.
One, it loses efficiency if there is insufficient fluid to port to the clutch side, and two, it works off the temperature of the coupling not the temperature of the engine/engine coolant IE it relies on convected and/or radiated heat to decide how much air it pumps.

I used one tube of the Toyota stuff and it was fine.

after you clean all the old stuff out you may need two tubes,
better to have extra its cheap enough to buy

Yeah I used 1 tube on my GQ but had 2 tubes just incase. I recently used the other tube I the GUIv but think I need a second tube for the GUIV so will grab another in the coming week or so and top it up.


Toyota genuine part
Oil, Silicon
P/No 08816-10001
Loc No. M1-11-03-3C
18ml tube

Thanks heaps fellas. I will pick up 2 tubes and get it done over the next week or so. I shall do a right up on it with picks for future.

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Have a read through this article.

http://neuralfibre.com/paul/4wd/tuni...ous-fan-clutch

[QUOTE="FNQGU;587490"]Have a read through this article.

That's a good read thanks man. Along with evil twins post they both give me a way better understanding of how it works.

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Ok went and picked up the oil/silicone yesterday. Just wondering did anyone that has done it replace the "o" ring. If so where did you get it from.

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My mechanic did mine, we cleaned it all out and used two tubes of the toyota viscous oil and now it works better than a new one but damn you can hear it now haha.