beatle_bayly

Easy to make. Drill two 11mm dia holes on 64mm centres in some 6-10mm plate. Use the gasket or the end of your pipe as a template and grind down to shape. Shape isn't super critical as there is room around the flange.

OK, so it's not the fluid viscosity at rest that provides the 'friction' to lock the clutch but rather the "unique non-newtonian shearing characteristic of the silicone fluid." Got it!👍 But still looks to be quite experimental in determining...

Here is a great video about the fluid action inside the fan clutch.

Thanks mate. Two things though: 1. Shouldn't the fluid become more viscous at higher temps (to add resistance within the hub at high coolant temps)? 2. The only reason I'd be replenishing the hub would be if I suspected the fluid was depleted...

Does anyone know the correct quantity of silicone fluid required to correctly service a viscous fan hub? Or the method to ensure the level is correct? I've heard: 2 bottles, 3 bottles, lay it flat and fill the reservoir half to the brim, and...

DOT5 is silicone based. Dot 5.1, DOT4 and DOT3 are glycol ether products. DOT3 to DOT5.1 are mixable and have higher thermal tolerance the higher the number. DOT5 doesn't mix with water and to use it you really should completely overhaul the...