Thread: Viscous Fan

looks like the viscous fan has decided to fail now along with just about everything else on the vehicle.
I'm thinking, as a temporary measure, of drilling a couple of small holes into the alloy down the flats of the main nut and putting a couple of steel pins down and tacking them to the end of the nut (to allow a spanner to fit still)
This should fix the whole fan together as one piece (stop the fan from rotating individually)and means no viscous operation.
From what I can see this should not be a problem, but.... can anyone else see a problem that I can't This would only be a temporary measure until I can obtain a replacement unit.

I think it may depend on how you drive.
AFAIR VCs are designed to run under about 3000RPM.
If you have a weak blade from previous damage you could find it poking out of the bonnet one day.
So if you use 4200RPM at all, I would think twice.
I have seen the damage on an RRC and it ain't pretty, although I think D2 fans are nylon weave filled and this may cause the blade to become floppy rather than part company.
I had a trimmed down D1 fan on my RRC and when I hit water a couple of blades became floppy, rubbed against the radiator but didn't cause a hole.
Regards Philip A