Part numbers for fan clutch oil (1 Viewer)

[shfd739]

Does anyone have the partnumbers for the Toyota CST fan clutch oil? Im putting on a new fan clutch and want to go to a heavier fluid due to how hot it is around here.

The local parts guys have trouble looking up odd parts like the fluid.


Thanks in advance.

 

[alkaline747trio]

Not Toyota stuff....use 15k-30k wt OFNA diff fluid (r/c car stuff). Hobby shops normally stock a variety.

 

[IdahoDoug]

I wonder about the durability of the R/C stuff. The fan clutch sees some serious torque and some serious heat and 10 years of daily use at that level. I'm going to mod a clutch too, but considering the downside of an overheated engine I'm curious what others are thinking about using R/C fluid versus Toyota's proven and tested vintage?? Is this type of fluid the same as Toyota stuff, or would the additive package in the Toyota fluid be designed for the harsher automotive application?

DougM

 

[nicholas]

I wondered about the durability too, but ultimately it was more convenient to have CDan ship me a bottle or two along with some other parts I bought. I've given up on trying to mess with local dealership parts monkeys especially the ones in Des Moines and Spokane. 9 times out of 10 they won't have the part in stock and they want to charge you close to double of what Dan will sells it for. By the time they order it and I drive across town to pick it up, I could already have the correct CDan/Beno-packed parts waiting on my doorstep.

I put Mr T 10K cst in my blue hub fc and it definitely makes a difference in my engine temps.

 

[IdahoDoug]

MPG impact of the stiffer fluid??

DougM

 

[shfd739]

Ive considered the R/C oil, but like Doug I question how well it will hold up in this setting. Im pretty sure an R/C car wont put the load and stress on that my fan clutch will on 100 degree days here in the south.

Ive read that going to the stiffer fluid does have a mileage hit (maybe 1-2 mpg) but Ill sacrifice a little to not worry about overheating and having cool A/C.

Im thinking of draining what I can and refilling with 7k fluid. I think the 10k might be a little much. But seeing as the coast is already having 100 degree days and we are moving to Texas next month maybe the 10k wont be too much?

 

[gotmud]

FWIW, I used fluid from an RC supply store in mine about a year ago. I went with a 20K fluid. So far it is still performing as intended. I believe the higher weight has made a huge difference in the rig's ability to not only keep engine temps "normal" during our hot Phoenix summers, but also keep the A/C blowing ice cubes at idle either on the street or on the trail. I also have a JDM fan that helps as well. I did this mod on a Hilux last year, and the owner has mentioned the night and day difference with his A/C performance as well. I'm certainly not a silicone oil aficionado, but I do know that it is used in industrial applications which are more demanding than R/C cars and fan clutches.
As for my mileage, I have not seen any noticable increase/decrease.

 

[Tools R Us]

My setup is early blue hub (full shearing ridges) 10K fluid and valve adjusted slightly warmer than stock. IIRC the mileage slightly increased when it was in stalled. This could be from the A/C not having to work as hard, lower head pressure or the fact that I don't keep the best mileage records and it's actuality about the same. Other locals have also reported slightly better mileage with this setup.

If the valve is adjusted too cold, then your wasting energy blowing relatively cool air around that is doing zero good and can see a mileage hit. With the valve properly adjusted and thicker fluid, when needed the fan runs strong and turns off when not needed.

 

[spressomon]

FWIW: I just drained my OEM fluid (Blue fan mount; 100 series) and replaced itwith 10,000cst from a hobby store. I let the old silicone drain out for 2-days. And did repeated fill/sit/fill with the new silicone to ensure it was full.

Locrwln partially filled his with a blend of 7,000 and 10,000cst and wasn't quite enough to make it work properly which is why I went with straight 10,000cst and more volume. There may or may not have been other issues with his fan clutch; he eventually replaced the fan clutch with an OEM.

This is the first time I have heard my fan during take-off from a start. It cuts out although I can't tell for sure at what speed. MPG was not affected. This is also the first time (I replaced the original fan clutch with a new OEM fan clutch assembly almost 3-years ago) the A/C blows REALLY cold at or near idle.

So far so good.


FYI: One other thing to check: Make sure the evaporator and radiator are free from dust/bug/mud accumulation. Just use a garden hose to clear it as most high pressure washers including self-serve car washes might fold the fins over...

 

[Tools R Us]

...
FYI: One other thing to check: Make sure the evaporator and radiator are free from dust/bug/mud accumulation. Just use a garden hose to clear it as most high pressure washers including self-serve car washes might fold the fins over...

X2, my favorite method is a sprinkler. The trick is to keep it wet for an hour or so, to rehydrate the baked on mud and bug entrails, then soap and rinse off.

I have used Toyota, hobby store and chemical supplier (Clearco and now have some Dow Corning) Fluids. Some of the clutches are working on their 4th AZ summer and all are preforming well, cant tell a difference. At this point I would say use what is easiest to obtain or what your comfortable with. IMHO it's not a big deal, even if one type were to be proven to have a shorter life, it's easy/cheap to change.

 

[landtank]

Since the local hobby store has closed I'm buying on line. The brand name is X-Ray, rated in CST and comes in a 35ml bottle which is perfect for a single fill if drained completely.

My hobby store clutch fill in on it's second year with out issues.

 

[alkaline747trio]

It's oil. Not rocket science. The weight of the oil is all that matters with torque and load and all that, 10k CST is 10k CST..... Plus, I've run OFNA gear oil in my E-maxx since 2001. Took the diffs apart this past Christmas to install a spool, oil looked like it came out of the bottle. More than 100hrs on that diff.

There's big money in R/C, I wouldn't worry about quality.

 

[fghanem]

Toy number's

08816-10001 10,000 cst

[FONT=verdana, arial, helvetica][SIZE=-1]08816-06001[/SIZE][/FONT] 6,000 cst

[FONT=verdana, arial, helvetica][SIZE=-1]08816-03001[/SIZE][/FONT] 3,000 cst

 

[shfd739]

Ill check the local hobby store and if they dont have it hit the Toyota dealer. I have a new blue clutch to install as my stock clutch has gotten super weak. I dont know if it's fluid or age but a new one is somewhat cheap so I thought I might as well go for it.

Im going to go ahead and change the fluid in both to 10k fluid. If that cures the original one then Ill have a spare. If not Ill drain it and just have extra fluid for the future.

Thanks for yalls help.

 

[cruiserdan]

You will find virtually no dealers stocking the stuff because the original application is more than 30 years old. Toyota has not sold "serviceable" fan clutches in the US since the mid 1970s.

Partsvoice shows 4 dealers in the US with 6,000 cst, 7 with 10,000 cst.

 

[Tools R Us]

It's oil. Not rocket science. ...

Actually it's not oil, it's polydimethylsiloxane polymer fluid, so closer to rocket science.;p

My guess is the fan clutch transfers more torque, in a higher temp environment and for longer duration, than a R/C car, so how pure it is probably has a much bigger impact on fluid life in this application. The hobby store stuff that I have used doesn't list purity, but so far it hasn't proven to be an issue.

 

[Michael Hanson]

Is there a Toyota clutch fan sold with 10,000 already in it Dan? thanks, Mike

 

[shfd739]

You will find virtually no dealers stocking the stuff because the original application is more than 30 years old. Toyota has not sold "serviceable" fan clutches in the US since the mid 1970s.

Partsvoice shows 4 dealers in the US with 6,000 cst, 7 with 10,000 cst.

I figured I would have to order it. I know they just love all these little off the wall parts orders I come and make.

Hobby shop had it in stock so I got some there.

 

[jvazquez53]

They sell the fan clutch oil, (better known here as silicone) at any auto parts store, and is cheap. I went and replaced my fan clutch all together since mine was leaking very bad and wanted to take no chances off road.

 

[BillyGoatMTB]

*Bump*
I'm wanting to upgrade my Aisin blue fan clutch fluid.

I found the Toyota 10k cst silicone (08816-10001) does any have the part number for 15k Toyota silicone?

I am reading alot of folks on mud are using 38ml-60ml of straight 30cst or mixing the 30&10 to get 15k.

Looking for the right / RELIABLE way and weight to do it.

Thanks Mud