550i metal grinding sound after 20" 343m install????

Mr.Heady · 02-08-2017, 01:07 PM

Hey guys I have a 13' 550i m sport w 20" 343m wheels and I am hearing and feeling a metal grinding sound on medium/hard acceleration. It doesn't feel like Wheel rub or anything like rubber contacting plastic. I have gotten under and taken a few looks and I dont see any evidence of metal shavings or any divits or marks so I am really confused. Do I possibly need spacers if so how much, if not do u have any ideas. I have pzero 255/35/20 for fronts and backs are 285 /30/20

bake · 02-08-2017, 10:06 PM

I believe LCI 550's require a 3mm spacer up front to clear the brake calipers. Your '13 isn't an LCI, but check the front calipers for scoring. Maybe for some reason your car has the newer type calipers.

Mr.Heady · 02-09-2017, 03:07 PM

Quote:

Originally Posted by bake

I believe LCI 550's require a 3mm spacer up front to clear the brake calipers. Your '13 isn't an LCI, but check the front calipers for scoring. Maybe for some reason your car has the newer type calipers.

OK I will check that out. Wouldnot that be making noise all the time though. Why would it only be on hard acceleration..

02-08-2017, 01:07 PM	#1
Mr.Heady New Member 0 Rep 22 Posts Drives: 13' 550i Join Date: Mar 2016 Location: Los Angeles iTrader: (0)	550i metal grinding sound after 20" 343m install???? Hey guys I have a 13' 550i m sport w 20" 343m wheels and I am hearing and feeling a metal grinding sound on medium/hard acceleration. It doesn't feel like Wheel rub or anything like rubber contacting plastic. I have gotten under and taken a few looks and I dont see any evidence of metal shavings or any divits or marks so I am really confused. Do I possibly need spacers if so how much, if not do u have any ideas. I have pzero 255/35/20 for fronts and backs are 285 /30/20
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02-08-2017, 10:06 PM	#2
bake Colonel 602 Rep 2,196 Posts Drives: 2011 F10, 2013 E93 Join Date: Apr 2010 Location: New York iTrader: (9)	I believe LCI 550's require a 3mm spacer up front to clear the brake calipers. Your '13 isn't an LCI, but check the front calipers for scoring. Maybe for some reason your car has the newer type calipers. __________________ *Bake* 2011 Alpine White on Black 535i M-Sport 2013 Space Gray on Fox Red M3 Vert
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