JiB 2 Report post Posted July 30, 2008 We have a PFL E46 328i sedan. A family friend replaced the rear brakes as a favour for dad, but now they're hideously noisy at all speeds. They sound like race brakes basically, kind of a deep squealing. Any pointers to a solution before I start ferreting around in there? I'm guessing there is an anti-squeal shim of some sort that is missing.. I don't have a garage to work in at the moment so it's fairly unpleasant weather to try and figure out what is wrong. So any help would be greatly appreciated before I start. Cheers! Quote Share this post Link to post Share on other sites
*Glenn* 855 Report post Posted July 30, 2008 We have a PFL E46 328i sedan. A family friend replaced the rear brakes as a favour for dad, but now they're hideously noisy at all speeds. They sound like race brakes basically, kind of a deep squealing. Any pointers to a solution before I start ferreting around in there? I'm guessing there is an anti-squeal shim of some sort that is missing.. I don't have a garage to work in at the moment so it's fairly unpleasant weather to try and figure out what is wrong. So any help would be greatly appreciated before I start. Cheers! They dont have shims. Either the job has not been done properly, or its the aftermarket pads they used. Did they machine the rotors and fit genuine pads ??? Quote Share this post Link to post Share on other sites
JiB 2 Report post Posted July 30, 2008 (edited) I'm not sure what has been done. Will ask. I'm hoping the rotors have been machined. I thought that was common practice. Would unmachined rotors and aftermarket pads cause such noise? Thanks for the help. I would take it to you Glenn, but Botany is a long way from the shore. Edited July 30, 2008 by JiB Quote Share this post Link to post Share on other sites
M3_Power 636 Report post Posted July 30, 2008 (edited) The rear calipers (like the fronts) have an anti rattle clip that clips onto the outter face of the sliding calipers - looks like this installed: - if that's missing the pads usually rattle not squeal though. Some people put anti squeal grease on the back of the pads, but I believe majority of BMW brake pads are a dry fit with no grease. I've fitted aggressive pads to cars with both methods and it's made bugger all difference. If the discs aren't machined you'd usually hear a rattle or rumbling sound (being on the rear wheel you won't feel the vibration). I'd put my guess on incorrectly fitted pads or just general cheap crappy pads for making those sort of noise. Another possibility is incorrectly adjusted hand brake shoe .. those can cause a squeal ... or a stone stuck in between the rotor and the dust shield ... Edited July 30, 2008 by M3_Power Quote Share this post Link to post Share on other sites
smiddy 76 Report post Posted July 31, 2008 Your a class act Ron! Quote Share this post Link to post Share on other sites
kiwi535 538 Report post Posted August 4, 2008 is the anti dust sheild now rubbing on teh disc? Quote Share this post Link to post Share on other sites
pjay 8 Report post Posted August 4, 2008 check your rotors for a lip on the edge, if there is one, have it shimmed Quote Share this post Link to post Share on other sites
QuickSilver 0 Report post Posted August 4, 2008 Get them put in with the pad material against the disc not the backing plate?? I have done this... secret shame. (not on my bmw though) :S Quote Share this post Link to post Share on other sites
