Blue fan clutch mod...Thread has gone to hell, read at your own risk (3 Viewers)

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Hi Flint, Landtank and these guys are the experts but all of the ones I have done take less than 59ml as a matter of fact I'd bet that's too much. I am guessing that there is about 8-10 ml left in the bottle (59ml bottle) when I am done. I just did a black hub last week and decided to leave the O-ring in place, no problems at all, I just put a little film of silicone on it before I put it together, like oiling your oil filter ring. I put it in the oven upside-down on the lips of a pan at 170* for an hour or so then let it sit overnight to drain down. Next morning popped it back in the oven to heat it up a bit, wiped off any residual drips/film with lint free cloth then filled it, let it sit, topped it off, let it sit, topped it off, let it sit, repeat until it quits settling (couple of hours), might even twist it slowly to help it find the nooks and crannies. Back together and in the truck. If you take it off, putting the O-ring back on isn't all that hard to do especially if you put a little silicone in the groove to help it stick, it can be like keeping two cats in a bathtub but once you get one end (or one cat) to stay then you can use both hands on the other end (the opposable thumbs help hold the first end).

For what it's worth, I run 20k in one of my trucks but found that being set at 95 was too low, it was pulling really hard and too soon so I reset it to about 110+ and like it there so far but I still haven't loaded up and taken it to the mountains in hot temps with the Yeti mounted in front of it yet.
 
Thanks guys, I did read almost all of the posts here (40+ pages) and found the most recent ones to be most beneficial, but wanted to be sure I understood it.

Thanks for everyone's hard work and input. I probably won't time my clutch to 95°, more likely 110°. Some mornings...by the time I go out the Cruiser it is already 95°.
 
About 45ml is fine for all clutches, the Eaton can take a bit more, don't know if it's productive. Have seen the Aisin work with as little as 25ml, more may have the effect of extending fluid life.
 
I need to see if one of these fits on my Mustang. It doesn't cool very well at idle so it needs at least a clutch. It would be awesome to have a relatively cheap alternative to the clutches off the highway patrol cars. Fxxxers want almost $300 for one!
 
For some reason i can't seam to find what the recommended temp set point is. i also can't seem to figure out what viscosity oil to use. please help me out. I went out and checked and I've got a blue fan clutch. There's no fan roar at start up but i have heard the fan running on really hot days (90* or more) with the ac on. the coolant will get any where from 190 to 210 and spike to around 220 sitting. temps coming from my bluetooth adapter and phone. seams like if I'm understanding correctly i need to adjust the clutch to 95* and should change the fluid to 15k? is this the right fluid?

I live in Montana so its cold more than it is hot but there are a lot of mountains around me. thanks
 
I didn't like mine at 95* (a hot ambient day kicks it in) but I do like it at about 110*-115*. I lowered viscosity from 20k to about 17/18k which works for me because of a cooler mounted on the front for trips to the mountains, I'd think 15k would be just fine.
 
Just wanted to let this group know how much I appreciate the accumulated wisdom on this subject. My 2L-T was overheating like nobody's business at highway speeds over 60 on inclines even with the a/c stripped out, a new radiator, water pump, etc. and 40 degrees F outside. I ordered a new fan clutch and received a modern blue one but it made no difference and could be turned by hand no matter how hot the truck got. I took it apart last night and adjusted the timing as instructed. The screws ended up all the way against the edges of the slots. The holes in the new coupling are very different than what is pictured - large rectangles rather than round pinholes - but it adjusted the same. There seemed to be very little fluid in it so I added about 1/3 of a 1.8 oz bottle of 10k. Road test was clearly cooler and I could hear the difference from inside the car once the fan locked up. I will have a longer road test in a few months when I am next in the states but I am confident that this will make a big difference and will allow me to run a/c again.

Thanks all.
Rich
 
Another mod here. My original fan clutch failed, the bearing fell apart and the fan was flopping around like a fish, cut the A/C belt and was working it's way through the first fan belt when I caught it. I was on a road trip in vegas and removed the whole assembly, and drove from Las Vegas to San Diego with no fan. I watched temps on an OBD app and all was fine.

I found this in my old clutch:

IMG_20170208_203206-XL.jpg


The new blue clutch came from the factory set at about 120. I set it to 100 even, it didn't seem to have enough adjustment to get all the way to 95.

This is a pre-adjustment photo:

IMG_20170206_202129-XL.jpg
 
The difference between 95 and 100 is rather small. We're you maxed out at 100?

Yes I was out of adjustment at that point. I did notice the movement of the spring isn't very smooth, it tends to jump around like there is some 'stick' in the shaft going through the housing.
 
Just performed the modification and in the process stripped out 1 of 2 screws on the adjustment plate. I was able to get it out by taking my die grinder with a thin cutting wheel a cutting a groove right down the middle to fit a flat head in there and get it out. Just make sure to thoroughly clean out any metal that you see. Just my $.02
 
Just performed the modification and in the process stripped out 1 of 2 screws on the adjustment plate. I was able to get it out by taking my die grinder with a thin cutting wheel a cutting a groove right down the middle to fit a flat head in there and get it out. Just make sure to thoroughly clean out any metal that you see. Just my $.02

Its likely because you didn't use JIS tools. Anything other than JIS bits WILL strip the heads.
 
that aisin looks like a diesel clutch. definitely not a blue hub clutch. or maybe a clutch for a 3fe.

You're right. I tried installing it today and everything lined up until I tried tightening it down to the water pump. The hole in the hub that mounts to the water pump shaft was too small. You can see in the pictures where it was hitting the shaft.

IMG_20170430_175653.jpg
 
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Its likely because you didn't use JIS tools. Anything other than JIS bits WILL strip the heads.
Ja. Look for VESSEL brand. I believe all 80 Series screws are JIS.
 
When I moved to central Florida last summer I noticed that my truck ran with the slightly higher (192) engine temp compared to California (185). I put it down to the higher humidity. This week we have seen temps here upwards of 90f and my truck has been running at 198f on the freeway. Still not too worried until I noticed 2 things. 1) at traffic lights the temp is creeping up to as high as 208f and 2) the external ambient temp sensor I had installed in the front grill was also showing an increase in ambient temp. Then I thought - hold on, if ambient air is being drawn in by the fan past the temp sensor why would the sensor be reading warming air? Only explanation is that there isn't ambient air being drawn into the engine and my fan is AFU. Guess I need find some time and start reading this thread with some urgency.....:frown:
 

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