Forum Discussions about this Product

1. A

   Diaphragm springs

   • Arimoto
   • Sep 13, 2018
   • E39 M5 and E52 Z8 Discussion

   4

   1K

   Sep 15, 2018

    by Arimoto
   1. 

      herrubermensch

      · Registered

      Joined Aug 19, 2008

      ·

      9,288 Posts

      #4 · Sep 15, 2018 (Edited)

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      That is weird. You need to replace the cam bolts anyway. I would do so. They definitely are NOT BMW bolts (which, in this application, suck), but perhaps the bolt head was too big for the application. Make sure you get bolts with heads that are no taller than stock. There is a thread somewhere on the board in which I posted a link to the bolts we always use. Black Oxide 12.9.
      
      --Peter
      
      PS: Here you go: https://www.amazon.com/gp/product/B...e_o08_s00?ie=UTF8&psc=1&tag=m5boardconvert-20

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2. M

   VANOS bolts for cam gears - replace?

   • ///M3Augy
   • Mar 9, 2016
   • E39 M5 and E52 Z8 Discussion

   2

   23

   8K

   Sep 30, 2017

    by herrubermensch
   1. 

      herrubermensch

      · Registered

      Joined Aug 19, 2008

      ·

      9,288 Posts

      #9 · Jun 10, 2017 (Edited)

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      estreetgt said:

      How necessary is it to replace 07119919625? I ask because I'm having a heck of a time finding them, seems the part or part number is discontinued. Web searches are indicating it's superseded by "ISA Screw 07129903807". If I wanted to shop a replacement from McMaster-Carr etc, what should I be looking for from a material/plating stand point? Socket head full thread M6x25 10.9 or 12.9 zinc-plated?
      
      
      I'm in the middle of a chain guide replacement and doing the vanos work while I'm there.

      Click to expand...

      Absolutely do NOT re-use those bolts (the bolts that connect the cogged gears to the cams). We do not even use brand new BMW bolts for that application, as they are easily stretched Grade 8.8 bolts. Torque them to 12.5 NM and watch them snap. We use 12.9 socket heads and torque them to 12+NM. The E46/S54 guys do the same thing.
      
      --Peter
      
      Here on Amazon: https://www.amazon.com/gp/product/B01DJAYH56/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1

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