I would like to repair my fan clutch. How hard is it to remove the fan and where do I start?

Mike
1985 US

 

Mike - Removing the viscous pulley fan is not that difficult. Probably could be done in 15 minutes. First remove the intake tubes from the upper radiator fan shroud. Remove 2 bolts that hold the upper radiator fan shroud to the top of the radiator. Pull straight up on the upper radiator fan shroud and it will come out. Remove the 3 bolts that hold the radiator fan assembly to the front of the engine and pull it up and out. You may want to loosen the belt that drives the fan pulley first. The tensioner is on the air pump for US models I believe. Good Luck!

 

Mike,
Probably quicker than what Paul said.
But, you have to add a couple of hours for cleaning things you didn't know were dirty.
Say!
You are on your way to a self taught TB change.

 

What about the mount for the trottle cables? It appears to be in the way of the bolts that hold the assemble to the block. Doesn't that need to come off first?

 

Isn't there some issue about keeping the viscous fan components in a certain orientation as in not lying it down flat? Don't know where I saw this as it wasn't something I was into at the time.

 

I believe the service manual recommends maintaining a near horizontal attitude while servicing. Page 19-4

However see for viscous clutch repair

http://home.comcast.net/~slyjay/Page7.html

 

If you have an issue withe viscous, I suggest go electric as first option, after trying the refill with fluid stuff. It didnt work for me, but YMMV. Try pushing fluid in with a small plastic syringe, its much faster than dripping it in.
With a bit of engineering, I used another make of viscous and fan assy on mine - cheaper viscous unit, more readily available was my angle, and a bigger fan (Land Rover). I have a note on this, which I could send if you want.
jp 83 Euro S AT

 

GT,
Perhaps on the later models ...
but the 82 has no interference problems with regards to throttle cables,
cable mount(?), and fan assy/mount/bracket/hardware.
Deb,
It's a gravity thing...fluids seeking the lowest level... and getting that crap to flow easily.
Has anyone heated that Mitsu fluid up befor attempting the fill, syringe or otherwise? I seem to recall someone saying they had heated the assy with a hair dryer -after clean-up- to promote a faster fill.
Anyone ever disassembled the unit and installed a zerks fitting?

 

John, the 32 valve pre S4 engine has the throttle connections mounted to the fan assembly. In order to remove the linkage to the throttle body the entire plenumb might need be removed. Jeez, I just put it all back on. Sigh!

Wally P suggested using a heat gun to speed up the silicon flow in his write up.

 

Yes - If you lay the fan face down, it will leak. The manual calls to store the fan upright, when not in use.

 

People have done this apparently successfully. the question remains if the silicon found its way out before, what is going to keep it in this time?? After my R&R and normal driving, I found small dark smudges on the inside of the fan shroud. I assume this is the same silicon I went to the trouble of ordering special from Toyota and spent hours putting in. Unless you can determine the cause and remedy that, I think your effort is wasted. FYI, my fan would break loose, it just seemed stiff, if anything it was turning at near 100% of belt speed; it is the same now and I have no cooling issues.

 

What is the advantage of having the multi speed fan? Noise? Why not just lock the fan to the drive shaft and have it run at engine speed all the time?