Servicing the Viscous Fan

I found this on a 4X4 forum.

Change silicon oil in viscous fan clutch

Has anyone tried it on their viscous clutch for the 300?

Garry

 

thats awsomeeeeeeeeeeee

i wonder how much the oil is. doubt itd be much

organise it for us. gb

 

pretty sure that the z32 one is a sealed unit !!! i could be wrong tho

 

Great post.

 

oil

If you have trouble getting the oil from Toyota, get the same stuff from your hobbie shop. Its the Silicon Shock/Diff oil for RC cars

 

meh,just grab some fork oil , cheaper , make sure its the silicon stuff tho

Trev

 

Just for the record, if the fan keeps spinning after you turn the engine off it means that the unit is NOT working properly? Makes sense to me but just want some confirmation.

 

correct

 

I encountered all sorts of high engine bay heat temp issues for over a year.
After just about changing everything out, I finally discovered it was the fan clutch that was the culprit. For I don't know how many years, there had been a very very small leak that would collect dust/debris on the inside edge of the plastic fan blade. It wasn't til I was changing out the rad for a larger one that I discovered this inordinant amount of oil-based crud build-up on the inside lip of the plastic fan blade. After I had taken the Z for a nice run and the engine was once again hot, I gave the fan blade a spin by hand and it moved quite freely. This should not happen. I changed out my fan clutch for another (used) one and now my engine temps have come down dramatically. I now average around 165F to 170F in all driving conditions. A far cry better than the previous 210F and sometimes 220F.