M54 engine viscous fan. Not sure if I have an issue.

Mint

Mint

Zorg Expert (I)
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British Zeds
East Anglian Crew
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Sep 23, 2012
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2.2 Sport Individual
@Pond, if you do change the viscous coupling don't forget that the big nut is a left hand thread.
 
Ianmc

Ianmc

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The M44 Massive
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Z3 (M44)
Why not delete the viscous fan, it doesn't seem to be needed? Or just leave as is.
Whilst no real comparison, my M44 only has the electric (aircon) fan and has no other fan installed from factory.
 
Nodzed

Nodzed

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M Power
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Z3M Imola and Z4 (e89)
The M54 primary cooling was by viscous, if it didn't have AC the electric fan wouldn't be fitted. Always better to have both systems if they are there, always a back up if the primary fails, I deleted the viscous on my M, under normal and vigorous driving all was OK, but under prolonged high revving very vigorous driving the electric fan didn't cope well, hence I put it back. I would leave things as Mr. BMW designed it, I'll wager he knows better than us. :whistle:
 
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