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Anyone tell me what these are and where they go?

Discussion in 'E90/E91/E92/E93 (2006-2011)' started by wellardmac, Feb 12, 2013.

    • Member

    wellardmac Ninja World Traveler

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    When I bought my E90 M3 I was given a couple of threaded pins by the previous owner. He said they were "pinion pins" and that he took them out to help handling when he autocrossed.

    I would like to put the pins back in their rightful place, but a search on "pinion pins" didn't turn up anything useful to tell me where they go and how to put them back. I would really appreciate guidance from anyone that can point me in the right direction. IMG_0029 - Version 2.jpg
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    instantfob

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    That looks like the alignment pin that many owners tend to remove in order to dial in more front camber.

    ref: linky
    • Member

    wellardmac Ninja World Traveler

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    Thanks! Yes, I managed to eventually figure it out, but have not yet consistently gotten a straight answer on whether removing them contributes to excessive tire wear.
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    instantfob

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    It depends on how aggressive negative camber the alignment shop dialed-in post knocking out the alignment pins.

    More negative camber = more inside tire wear / / oomoo \ \ . vs . ___| | oomoo | | .

    Pardon me with the stick figures.

    If you take your M3 for an alignment back to factory spec then these pins will fit right back in.
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    wellardmac Ninja World Traveler

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    Thanks. Yeah, I'm getting the front tires replaced tomorrow and the alignment reset to factory specs. I hoped that it would be easy enough that I would have the pins reinserted... the current alignment has worn the inner tread a lot faster than the rest of the tire, so it's time to get that fixed.
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    mrsbee

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    Actually, I just got a phone call from Frankenstein, he wants his neck bolts back.
    • Member

    wellardmac Ninja World Traveler

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    Well, I got the new tires installed and the alignment done. They said that they were able to take the car back to a perfect factory alignment without reinserting the camber pins.

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