No announcement yet.

Diff cover- What is this????

  • Filter
  • Time
  • Show
Clear All
new posts

  • Diff cover- What is this????

    I got a Z3M cover and when i compared it to the old one i noticed that there is what looks like a hose connection to the top of the old one(passenger side) that is not on the new one.
    I assume this is a breather but do i need to modify something on the new one?

    I can not remember if there was anything connected to it and how it was:

    Here is how it compares with my new cover:

    Should i just bolt on the new one and not worry about it?
    Any advice much appreciated!!!!!

  • #2
    personally I would drill and tap that small vent hole fit an elbow pipe connector with a small pipe and extend it and put the breather further up out the way, but that's just me............


    • #3
      The stock cover has that raised pin with a small hole in it as a breather to expel any gases that build up. on the new cover you will see the small hole built in to the cover itself. I just installed the cover and have had no issues. The one thing I would say to make sure you do is install the safety wire that holds the sensor in like the original. Anyone correctly me if I wrong. Hope this helps. Hugo


      • #4
        What do you mean by safety wire?


        • #5
          Nothing to do. Bolt it on and go.
          2010 BMW Club Racing E30 M3 Touring Car Champion
          2011, 2013 SCCA Runoffs Super Touring Under 3.0L Bronze Medalist
          2011 SCCA Jim Fitzgerald Rookie of the Year
          2012 SCCA Northeast Divisional STU Champion
          2015 SCCA Runoffs STU Polesitter