The M8 screw in the front rotor
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2014 E350
The M8 screw in the front rotor
I changed out my front pads and rotors today. The drivers side M8 screw in the rotor was stripped. I got it out but have to wait for a replacement. Considering the rotor will be held by the lugs, how important is this screw to have in right away? Can I go a few days without it?
MBWorld Fanatic!
Joined: Apr 2006
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From: Dallas-Ft.Worth,TX
2016 E350 Sport
Open to correction, but I think the only function of that screw is to hold the disc in place so you can mount the rotors, or wheels. As you've observed the disc is held in place by each of the wheel lugs.
I know of a Honda dealer that removes the screw and pitches it (on a Honda, of course)
I know of a Honda dealer that removes the screw and pitches it (on a Honda, of course)
MBWorld Fanatic!
Joined: Oct 2014
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2011 E-350 4Matic Sport
^^agree.
Personally I keep or replace them, just a convenience retaining the rotor. I also apply minimal antiseize to all fasteners for ease of disassembly next time.
But I know folks that leave those little screws out.
Personally I keep or replace them, just a convenience retaining the rotor. I also apply minimal antiseize to all fasteners for ease of disassembly next time.
But I know folks that leave those little screws out.
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On cars with lug bolts as we have the disc needs to be stabilized so the caliper can be installed without needing 4 hands to hold everything together. There is no retainer screw on my Shelby discs because I have studs that the disc slips over, which makes installing the caliper easy and the wheel is attached with traditional lug nuts. When I swap wheels on the MB I use a guide stud that is screwed into the hub to help pilot the wheel into place.
