[StradaRedlands]

More excitement for my one-off F10... The "rattle" I thought was coming from my intake manifold has been diagnosed as the decoupler pulley. Cool, easy fix says I, right! But my shop says pulley doesn't exist for my car. Of course the service writer also didn't realize I had a N52 engine. I am limited with Euro indies in my small town, so that is what it is.

Long/short, FCP has the pulley and looks like it should be an easy swap. Buuuuuut, rather than a female hex bolt, my existing pulley has a 10mm(??) bolt that I can't fit a socket over, as well as fitting for a male hex sort of tool to spin it off, rather than the more universal splines I was expecting. Totally opposite of everything I see.

So, any suggestions? Should I try swapping out? Just buy a new alternator? Give up on internal combustion and buy an i4?

My pulley:



What I was expecting to find and looks like a "normal" Bosch pulley:

[StradaRedlands]

So, update to the update... the people that diagnosed this are idiots. Or just really don't give AF about figuring out the problem. I borrowed a stethoscope today and placed it on the alternator. Silent. I then placed it on the manifold, and click click click click... was definitely coming from there. So I'm presuming a DISA problem, although no codes for that. Tons of codes for valvetronic sensor though :-/

Alternator is showing a 210901 code showing lack of connectivity. I think they threw on a $150 alternator from Rock Auto rather than BMW or Bosch. So while it "works" it isn't talking to the system properly. Probably screwing up the battery in the process :-/

Oh, did I mention PCV needs replacing?

Valve cover, DISA, and alternator... April is going to be expensive. Worst part is that I don't have a respected/trusted Indy to go to.

Le sigh...