Need some advice on stainless steel line issues

Yobao · 04-04-2013, 11:37 AM

So my ///M was bought a year old and had came with SS lines in place. A month after attaining the car, I started noticing horrible break squeals. I took it into a dealership and they saw that the front discs needed to be changed in 2K miles and states that that maybe the problem and changed it. I did noticed a little reduction in squeal but not much. Decided to drive it for a little while longer to see how it is. Two months later, the squealing was just unbearable. I decided to take it to another dealer that said my SS brake line was warping my rotors because of the pressure (??). They replaced the rotors but states that they may not honor the warranty the next time because of the SS line. I did again noticed reduced squealing but not by much. I then posted my conundrum on this site at that time and the consensus seems to be that SS line causing warped rotors is crap. Suggested solutions were to try and do a bed-in phase for the new rotors and pads (which I did and it was FUN taking it to 70-80mph and back to 10mph), and anti-squeal foam. I tried both solutions and they did not do a thing for the squeals. It's spring time now and this squealing will bring my blood pressure up and induce several mini strokes in me if I don't get it resolved. I've decided that I'll bring it back to the dealer to have them swap out the SS line to stock line and then bring it back to them to have the problem fixed under warranty. My question is: is that possible? Or are they going to tell me that the squeaking is from the fact that I used to have SS line and wont fix it for me. Any advice on this mater is greatly appreciated. Thanks for reading guys. Cheers

Zzhou · 04-04-2013, 05:04 PM

first question, what pad are you using? My pfc08 will squeal no matter what.

edwinm3 · 04-04-2013, 05:35 PM

Your brakes need a good bedding. SS lines are not gonna mess up your rotors

MikeBlaszczak · 04-04-2013, 06:36 PM

Stainless lines don't warp rotors. Warped rotors don't cause squealing.

johnsim · 04-09-2013, 05:46 AM

SS lines warping rotors is ridiculous. At least you got new rotors out of the deal though. I wouldn't go back to that dealer.

Definitely find out what pads you have. Some performance pads will just squeal in all but the most perfect bedding conditions. Sounds like you want to have OEM on there. You might want to just take it to a decent racing shop where they will have dealt with non-stock brake setups before.

04-04-2013, 11:37 AM	#1
Yobao Enlisted Member 4 Rep 33 Posts Drives: 2015 SO M4 6MT Join Date: Jul 2012 Location: Chicago iTrader: (0)	Need some advice on stainless steel line issues So my ///M was bought a year old and had came with SS lines in place. A month after attaining the car, I started noticing horrible break squeals. I took it into a dealership and they saw that the front discs needed to be changed in 2K miles and states that that maybe the problem and changed it. I did noticed a little reduction in squeal but not much. Decided to drive it for a little while longer to see how it is. Two months later, the squealing was just unbearable. I decided to take it to another dealer that said my SS brake line was warping my rotors because of the pressure (??). They replaced the rotors but states that they may not honor the warranty the next time because of the SS line. I did again noticed reduced squealing but not by much. I then posted my conundrum on this site at that time and the consensus seems to be that SS line causing warped rotors is crap. Suggested solutions were to try and do a bed-in phase for the new rotors and pads (which I did and it was FUN taking it to 70-80mph and back to 10mph), and anti-squeal foam. I tried both solutions and they did not do a thing for the squeals. It's spring time now and this squealing will bring my blood pressure up and induce several mini strokes in me if I don't get it resolved. I've decided that I'll bring it back to the dealer to have them swap out the SS line to stock line and then bring it back to them to have the problem fixed under warranty. My question is: is that possible? Or are they going to tell me that the squeaking is from the fact that I used to have SS line and wont fix it for me. Any advice on this mater is greatly appreciated. Thanks for reading guys. Cheers Last edited by Yobao; 04-04-2013 at 12:14 PM..
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04-04-2013, 05:04 PM	#2
Zzhou Captain 57 Rep 600 Posts Drives: 2012 E92 SSII ZCP DCT Join Date: Aug 2011 Location: West Lafayette,IN/Shanghai,China iTrader: (0)	first question, what pad are you using? My pfc08 will squeal no matter what. __________________ AA Green Filter/AA Pulley/AA catless X-pipes/AA signature exhaust/AA TUNE/TMS studs/Project Kics R40/R888/VOLK ZE40/ST60,ST40 BBK/MCS 2WAY NR/Vorsteiner GTS5 Bumper/APR GT250/APR SPLITTER
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04-04-2013, 05:35 PM	#3
edwinm3 Brigadier General 980 Rep 4,001 Posts Drives: F82 Join Date: Nov 2011 Location: Broward iTrader: (32)	Your brakes need a good bedding. SS lines are not gonna mess up your rotors __________________ Grigio Telesto M4, 6MT. Coyote 5.0 F-150 991 GT3
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04-04-2013, 06:36 PM	#4
MikeBlaszczak Private 4 Rep 67 Posts Drives: 2010 BMW M3 Coupe Join Date: Mar 2013 Location: Mercer Island, Washington iTrader: (0) Garage List 2005 Cadillac Escal ... [0.00] 2010 BMW M3 [0.00] 1999 Porsche 911 Ca ... [0.00]	Stainless lines don't warp rotors. Warped rotors don't cause squealing.
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04-09-2013, 05:46 AM	#5
johnsim New Member 0 Rep 26 Posts Drives: 2010 M3 Sedan Join Date: Feb 2013 Location: San Francisco, CA iTrader: (0) Garage List 2010 e90 M3 [0.00]	SS lines warping rotors is ridiculous. At least you got new rotors out of the deal though. I wouldn't go back to that dealer. Definitely find out what pads you have. Some performance pads will just squeal in all but the most perfect bedding conditions. Sounds like you want to have OEM on there. You might want to just take it to a decent racing shop where they will have dealt with non-stock brake setups before.
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