Which fan clutch silicone oil to use?

[TejasRunner01]

Hello everyone,

I am having some issues with the fan clutch slipping on my 08 V8. For those of you that decided to change the silicone oil out, how much she what cst viscosity did you go with?

On the 80 series ih8mud forums, many are using as high as 50mls of 20k cst silicone oil. I live in a hot state, what would you recommend for this? I've never taken apart a fan clutch but seems like this is a relatively straight forward process. Also in case it helps, the clutch housing is gray, not blue which I believe indicates it is an Eaton.

Thanks!

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[JONBOY345]

I'd jump on car-part.com and see if I could just buy a used assembly.

 

[Bl4ck4rm4]

I would just go buy a new one. That is what I have done in the past with fan clutches. I wasn’t aware of them being disassembled to drain the oil out of. 20k cst is pretty thick material.


Now it makes me want to find a fan clutch in one of my parts bins to see if it is possible, it’s worth money who is look for OEM for restoration


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[TejasRunner01]

I just finished replacing the fan clutch with a new Aisin kit. In case anybody needs to know the exact model for the 2008 V8, it is FCT-075. There is so much more air pushing in the engine bay now, the original definitely was having issues. I'm going to make a small write up.

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