Just about a week ago, a noise kind of like a spinning started in my instrument cluster of my new 86 325eS. It gets higher with revs, like when i'm going through the gears, and stops when I put the clutch in. It started out fairly faint, but is getting to be slightly louder and it remains while in gear. It's definitely coming from the cluster, I can hear it in there. I'm almost postive it's the gears in the tach, since it changes with revs. Any ideas? Should I just replace the tach, and see if that fixes it?
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Spinning sound in tach
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Not that it's TOO big of a deal, but I just thought I would let everyone know that I fixed the noise, quite by accident actually.
I had my steering wheel unbolted, with the cover off because I was adjusting it, and I noticed that the sound seemed louder with the cover off. I put my hand over the opening that the cover goes over, and the noise got substantially quieter.
I stuck my finger on top of the hole in the center of the shaft where the bolt for the steerng wheel goes, and the noise dissapears altogether.
I think that the noise was just engine/valvetrain noise, being amplified by coming through that small hole. I just took a peice of this nice, squishy foam-rubber stuff that I lined the drawers of my toolbox in, jammed it in there nice and tight, and not a sound. I love it when there's a simple fix. :D
Yes, I know that it sounds like one of those "ignore the noise and it will go away" kind of things, but everything is running fine, and I'm doing a valve adjustment soon.
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