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loose anti-roll bar?
I have a "clunking" sound from the front end of my '99 996 with 52K miles on braking. This nly occurs after I have backed the car and braked. When I go forward and brake I hear the clunk. It only happens the first time I brake then dissapears.
I think it is a loose anti-roll bar. When I put the car on my home lift the bar has a bit of play (enough to make a slight rattling sound but not that loose). Is this normal. The bolts are tight but the bushing connecting the anti-roll bar to the slender vertical control arm seems worn. Any thoughts? Is this a problem or a minor annoyance?
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PCA National, BMW Club, SCCA HPDE Instructor. MSF Level 2 '23 BMW 540 iX (wife's driver) '14 Cayenne Diesel DD and tow vehicle '16 GT4 '22 911 Date night vehicle |
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08-25-2008, 01:21 PM
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It could also be the brake pads shifting back and forth when you brake in reverse and then forward. My turbo brakes used to do that with Axxis pads.
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2013 991.1 Carrera S Cab 2004 996 Turbo CAB X50 sold 2003 996 cab 6 speed Sold 1972 RS 3.2 twin plug short stroke crank fire, roll bar, sold DE instructor since 1985 |
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09-23-2008, 04:28 PM
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you shouldn't have any play in the sway bar links. double check the lower nuts and make sure those are tight
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09-23-2008, 04:51 PM
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If your sway bar was loose it would make noise when driving over bumps etc.
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2013 991.1 Carrera S Cab 2004 996 Turbo CAB X50 sold 2003 996 cab 6 speed Sold 1972 RS 3.2 twin plug short stroke crank fire, roll bar, sold DE instructor since 1985 |
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10-10-2008, 09:51 PM
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On further investigation it seems like the brake pads shifiting slightly. Is this a problem?
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PCA National, BMW Club, SCCA HPDE Instructor. MSF Level 2 '23 BMW 540 iX (wife's driver) '14 Cayenne Diesel DD and tow vehicle '16 GT4 '22 911 Date night vehicle |
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10-11-2008, 05:45 AM
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It is not a problem. I drove my early 911 fitted with turbo brakes for 17 years with this happening. Sometimes it would change/go away depending which brake pads I was using. You are better of with them a little loose rather then tight. If they were tight it could cause brake drag and over heating, rotor warping/cracking, grease boiling out of the bearings etc.. Double check the caliper mounting bolts to make sure they are tight.
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2013 991.1 Carrera S Cab 2004 996 Turbo CAB X50 sold 2003 996 cab 6 speed Sold 1972 RS 3.2 twin plug short stroke crank fire, roll bar, sold DE instructor since 1985 |
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10-11-2008, 05:50 PM
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1983 Porsche 911SC 3.0
911T
2000 
Cayman S
GT4
