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Registered
Join Date: Sep 2005
Location: Clifton, VA
Posts: 153
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floating rotor issue ?
hey all
79 930 I was checking my brake lines since I recently rebuilt my calipers, replaced bearings etc (4 months ago) and noticed that I have a bit of play with my rotors. when I move them back and forth.. Knowing they are floating are they suppose to have a bit of play.. do not recall them moving back and forth prior..but that could have been all the build up and corrosive bs that we pick up...I torqued them to spec and replaced the bolt locking stuff.. The other side does not move New rotors are Zimmermans Moves about 1/8 give or take...Enough to hear a sound when I move them back and forth Thanks
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Scott 1979 930 - Black on Black and in the woods "My third child that will cost more in the long run" :shock: |
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10-16-2013, 04:25 PM
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beancounter
Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,593
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Normal for the 78-79 floaters. When I changed mine a couple years back, there was so much dirt and corrosion on the aluminum hats, the rotors were no longing floating. When I installed the new ones I cleaned everything up, and now they float noticeably. I will say that they make a huge racket going down the road. So much, that when I install the next set of rotors, I may flip the backing plate so they don't float. Here's a link to my thread on floating rotor replacement and some photos that illustrate what I am referring to re: the backing plate:
'79 930 - Brake refresh in progress
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Jacob Current: 1983 911 GT4 Race Car / 1999 Spec Miata / 2000 MB SL500 / 1998 MB E300TD / 1998 BMW R1100RT / 2016 KTM Duke 690 Past: 2009 997 Turbo Cab / 1979 930 |
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10-16-2013, 06:54 PM
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Registered
Join Date: Sep 2005
Location: Clifton, VA
Posts: 153
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lol....I did used your site as a reference...Cheers for the feedback
Mine has been making a clicking sound recently...
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Scott 1979 930 - Black on Black and in the woods "My third child that will cost more in the long run" :shock: |
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10-18-2013, 05:08 PM
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Registered
Join Date: May 2001
Location: S.F. North Bay
Posts: 1,420
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FYI, 930s since the 80s.. Always floating rotors on front with very little noise issues. I currently run floating Big Reds on my 930.. with no issues. The stockers I removed were also relatively quiet. I wonder if a lot of it is modded bits and corrosion? Mine stay relative clean.
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10-18-2013, 05:14 PM
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