Blue fan clutch mod...Thread has gone to hell, read at your own risk

[Tools R Us]

If anything I'm getting slightly better mileage with the 10K.

I marked the valve plate before it was moved. Started out with it slightly to the cooler side (don't remember the temp settings), but it was on too much for my liking and the climate here. If set at 95F, the "cold" under hood temp is higher than that about 80% of the year, so it's on most of the time. Moved it back to stock, then slightly to the hot side. I found that coupled with the thicker fluid it works very well this way. It cycles more like an electric would, but with the thicker fluid it's much more effective when it's on.

I found, for me the best place to play with it is on the trail. If I let it idle for a few minutes, when first throttled it will be on strong. With the setting to the cold side it would stay on well past "needed", now it's only on for a few seconds even on hot days w/ the A/C, etc. I like the results of the thick fluid, but if your going to run 10K+, keep up on your belt maintenance, if their even slightly loose they will slip when you stab the skinny petal in low range.

 

[franku]

Does anyone know what size the threads are one the 12mm and 10mm NUTS holding the clutch and fan to clutch on are?

I want to get some new ones...

 

[Tools R Us]

Does anyone know what size the threads are one the 12mm and 10mm NUTS holding the clutch and fan to clutch on are?

I want to get some new ones...

8 x 1.25 mm and 6 x 1.00 mm, the Toyota nuts are flange type in both applications.

 

[franku]

8 x 1.25 mm and 6 x 1.00 mm, the Toyota nuts are flange type in both applications.

You're the man - Thank you!

 

[e9999]

generally speaking, people often greatly underestimate the amount of power it takes to move air with a fan. They are energy hogs. I would not be surprised to see a significant mpg decrease if the fan is on a lot. Scangauge anybody?

 

[landtank]

generally speaking, people often greatly underestimate the amount of power it takes to move air with a fan. They are energy hogs. I would not be surprised to see a significant mpg decrease if the fan is on a lot. Scangauge anybody?

This thread is about tuning the fan clutch to better handle the cooling demands of our engines in hot environments.

Maybe you should start a new thread with the purpose of altering systems to increase MPG. Get some people on board, as well as yourself, with the ScanGauge and start doing some evaluations and see where it goes.

 

[e9999]

This thread is about tuning the fan clutch to better handle the cooling demands of our engines in hot environments.

Maybe you should start a new thread with the purpose of altering systems to increase MPG. Get some people on board, as well as yourself, with the ScanGauge and start doing some evaluations and see where it goes.

seems like the possible consequences of a mod are relevant, but never mind, sorry didn't mean to highjack or make it sound negative. Just curious. And that was great work indeed.

 

[landtank]

seems like the possible consequences of a mod are relevant, but never mind, sorry didn't mean to highjack or make it sound negative. Just curious. And that was great work indeed.

it goes with out saying that if you increase the ancillary load on the engine that it will cost gas mileage. Just like adding a larger alternator to supply power for larger amp load.

The easiest way to offset for this on this mod would be to install a higher temp thermostat. That would increase the off time but the modded clutch would still prevent the engine from over heating. I have no idea how the ECU would take to it but it would give you back the MPG you lost.

 

[turbocruiser]

it goes with out saying that if you increase the ancillary load on the engine that it will cost gas mileage. Just like adding a larger alternator to supply power for larger amp load.

The easiest way to offset for this on this mod would be to install a higher temp thermostat. That would increase the off time but the modded clutch would still prevent the engine from over heating. I have no idea how the ECU would take to it but it would give you back the MPG you lost.

Or, better yet, put on the LandTank Modded MAF, get back the MPG you lost from the LandTank fan clutch modification and add some extra power and some extra response all at the same time!

 

[franku]

Are we talking about a lot of HP here?

 

[sundaypunch]

I have a question - I bought a blue fan clutch and a tube of 10,000 from CDan last year. I never got around to installing it. Now that I'm going to install I don't remember if I was going to just add the tube of 10,000 or if I was going to drain some first and then add. Recommendations?

I have no overheating problems. I'm in Michigan, the truck might see some 90F weather in the summer but I don't tow or do anything extreme.

 

[NaterGator]

sundaypunch:

personally I would drain the existing clutch fluid into a clean tupperware container or something of the sort overnight, then put the entire tube of 10k fluid in, then top off the rest as per the method in this thread. You won't use all of the factory fluid (obviously) but you will get the most benefit of the 10k fluid without coming up short on the total fluid volume or potentially overfilling (if that even causes any problems )

 

[Tools R Us]

I have a question - I bought a blue fan clutch and a tube of 10,000 from CDan last year. I never got around to installing it. Now that I'm going to install I don't remember if I was going to just add the tube of 10,000 or if I was going to drain some first and then add. Recommendations?

I have no overheating problems. I'm in Michigan, the truck might see some 90F weather in the summer but I don't tow or do anything extreme.

I have added a tube to the factory fill on new clutches without issue. Adding a tube of 10K makes for a nice performance increase.

 

[sundaypunch]

Thanks for the info. I did an about face and just ordered two tubes of the 6,000 fluid. I re-read the thread and it looked like adding a tube of 10k fluid would only get me up to 4k or so. I'd rather get the full effect of draining & adding two tubes of 6k.

 

[turbocruiser]

Rick, I was wondering, as an update, what is the average stock timing so far from all the clutches you have worked with? Have you noticed more or less variability than with those first few examples which varied widely? Are you still thinking that 95 is the right temp including for extreme winter weather or have you moved that point up or down? Great mod again as always!

 

[landtank]

the clutches have been all over the place some as low as 100* and others just over 120*. I've left mine at 95* and don't have any intention on changing it.

 

[turbocruiser]

the clutches have been all over the place some as low as 100* and others just over 120*. I've left mine at 95* and don't have any intention on changing it.

cool, thanks!

 

[cool breeze]

I've been looking through this for the last week and now ready to proceed but now i can't find the part numbers. SInce this is a really long thread with lots of info and OT discussions I think it would be a good idea to post the specs of parts in the fist post.

To begin with:
Toy part# blue hub fan clutch
Toy part# for tubes of oil, different weights
Details about the "hobby shop" oil

Once this is done it would be a great addition to the FAQ!

 

[Tools R Us]

I've been looking through this for the last week and now ready to proceed but now i can't find the part numbers. SInce this is a really long thread with lots of info and OT discussions I think it would be a good idea to post the specs of parts in the fist post.

To begin with:
Toy part# blue hub fan clutch
Toy part# for tubes of oil, different weights
Details about the "hobby shop" oil

Once this is done it would be a great addition to the FAQ!

Can't help with the part numbers, I just call Dan and ask for the parts. Maybe he will post the part numbers when he returns next week. The blue hub is simply the replacement clutch from Toyota. But there is a good thread on it over on the Mini forum, without all of the 80 series obsessive/compulsive commentary.

https://forum.ih8mud.com/79-95-toyota-truck-tech/167678-fan-clutch-service.html

 

[LC4LIFE]

Here is what I got from CDan and all I know is I have pulled my 3500lb trailer up some really long Colorado mountain passes with my family of 5 in the cruiser I have yet to get over 202 degrees. I am sold on this mod.

Fan Clutch 16210-66020
6000 cst silicone oil 08816-06001, I put in two tubes and adjusted the timing on the clutch to 95*