Viscous fan help

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Had my car
(1981 E12 M535i) in the garage for the past week for some bits and bobs, mainly
sorting out the overheating problem. Spoke to my mechanic this morning and he
told me the viscous fan for cooling is not working correctly (not spinning at
the right speed I guess), I think he mentioned the bearings or something, I
have no idea whatsoever about the viscous fan system, all my previous cars have
had electric fan systems, are parts of it available separately or is it all one
unit? Which parts will I need to replace and are they expensive?

Pete

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Peter e12 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 21-June-2004 Status: Offline Points: 20	Topic: Viscous fan help Posted: 13-September-2004 at 07:04
	Had my car (1981 E12 M535i) in the garage for the past week for some bits and bobs, mainly sorting out the overheating problem. Spoke to my mechanic this morning and he told me the viscous fan for cooling is not working correctly (not spinning at the right speed I guess), I think he mentioned the bearings or something, I have no idea whatsoever about the viscous fan system, all my previous cars have had electric fan systems, are parts of it available separately or is it all one unit? Which parts will I need to replace and are they expensive? Pete

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BMWE34sport Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member I Joined: 30-April-2004 Location: Hertfordshire Status: Offline Points: 353	Posted: 13-September-2004 at 09:44
	Hi Pete From other posts I have read it sounds like your viscous fan coupling has gone , basically the fan spins all the time then when the engine starts to get too warm a clutch kicks in and speeds the fan up to cool the engine down . Apparently if you roll a paper up and try to stick it between the blades when the engine is running, and it stops the fan then the coupling has gone ...This was replaced on my E34 a couple of years ago and looking at the reciept cost about �50 for the part (from and independant specialist) I could be wrong on this and would advise waiting for feedback from other users because it could be different on the E12 but you should be able to source the part from GSF Car Parts Edited by BMWE34sport
	1991 525 Sport

Peter e12 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 21-June-2004 Status: Offline Points: 20	Posted: 15-September-2004 at 06:23
	Thanks, just ordered a viscous fan unit it was 75 pounds which is less than I expected TBH hopefully this should cure the overheating, thanks again Pte

silverbmw528 Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Senior Member II Joined: 16-April-2003 Location: Bucks Status: Offline Points: 151	Posted: 15-September-2004 at 12:02
	�75 ? Take it back ! ECP do them for as little as �22.75. I Have had one on My E28 528i for the last 5 years with no problems at all, great quality ! E21 M535i Fan Coupling
	Andy, from www.bmwland.co.uk E34 525i Sport E28 528i