Viscous Clutch Fan issue - rb30 but may not be engine specific

[dom14]

Sorry, forgot to reply and car has been sitting there.

Yeah, when you turn by hand, it goes as far as you can push it and no further, she's tight!

Haven't gotten around to pulling it off yet. Life n that, ya know.

Hey Chris,

Mine goes about a quarter turn before it stops(when I give it a quick turn by hand).

What did you mean by "it goes as far as you can push"?
Does it turn a quarter or half turn and then engage the clutch and not disengage it at all?!

I would take the fan out and give a go at rebuilding it.
I would probably use brake cleaner, thinner or petrol and then dry it out in the sun rather than using WD40.
Before, filling it with the silicone liquid, see if you can find out whether the thermal valve is bad or not, perhaps by applying bit of hot air using a hair dryer.

The second video below shows a guy rebuilding it. Fairly easy and quick job. Well worth a try I reckon.
The silicone liquid isn't that expensive afaik, so have a go at it and let us know. Open it up first, clean it and check the thermal valve. If the valve is bad, then filling it with silicone liquid won't help.
I would even give a go at fixing/replacing the thermal valve(the bimetal thermal coil), just like the way I fixed the RB30 Nikki carby auto choke, but that that's me.

https://www.youtube.com/watch?v=UwM4OqsLek4

https://www.youtube.com/watch?v=zjhKr5usjaA

It's a little repair job well worth your time I would say, 'cos fairly easy and quick.
New clutch is pretty pricey and a wrecker one can be a hit and a miss.