VK Viscous Clutch Fan

[VK SL 3800]

Ok, i have been informed that my VK is supposed to have a Viscous clutch fan as it is fitted with AC but it doesn't, i know for fact that it has factory AC as the original owner gave me a few pics of it when it was a day old, (not on computer, and i dont have a scanner) showing the AC in the engine bay. I am hoping somebody else who has a VK with Factory AC and is a 6 carbie like mine could verify this. Also would like to know if you recommend putting one regardless and if you think they improve cooling efficiency.

Thanks

 

[ari666]

clutch fans do bugger all.... seriously. they just assist with acceleration. other than that a solid fan is better.

 

[VK SL 3800]

hmmm the only advantage over my 6 blader is it has larger and more blades which would move more air.
which would help in traffic, but on the open road the fan doesnt really do anything anyway.

 

[Darren_L]

the clutch fan is a bigger diameter fan, so yeah cooling is greatly increased over the smaller fan.
But if your A/C works fine and the engine doesn't overheat, no real advantage in changing it. Except the clutch fan doesn't use as much power when it's not needed

 

[VK SL 3800]

My AC works fine but my engine runs hot but not too hot even sometimes without the AC on, i reckon it need a new radiator because its the original and it wanst used much at all untill i got it and i think ive clooged it with crap coming off the block, plus the cooling fins are starting to look a bit how you going.
It was fine when i first got it, drove home on a 40 degree day for 450 ish kms with the gauge keeping just in the normal zone abit under 1/4 but now if i try and drive like that it runs about 3/4 and youve got to remember how optimistic factory gauges are in these old beasts. Anyway my fixed fan seems to do the job for now and with a new radiator it should all be sweet