3rd April 2006, 22:19
Junior Member, warming up (<31 posts)
Join Date: Jun 2005
Location: Mid Wales, UK.
E34 M5 3.6 in red
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Nasty air pump!
My 1992 3.6 has the not uncommon problem of a grumbling air pump.
Over the last 6 months, it seems to have got much worse, and from cold the engine now has to be run for 5 minutes and re-started to make it go quiet!
Looking at the mechanics of the system, I see that the clutch that drives the pump is controlled by a relay which also feeds the vacuum pump.
If I remove this relay, or the fuse for this circuit, I am hoping that my noise will stop.
Does anybody know where either the relay or the fuse for this circuit is located?
If anyone has had a similar problem or found an alternative cure, I would love to hear from you........