After CP/BOV install, I get a hissing noise when hitting the brakes

JunkyardDogg · 04-02-2016, 02:49 PM

I get a low level hiss/air noise whenever I hit the brakes. It doesn't happen all the time. Is this normal?

thkfast · 04-03-2016, 03:14 AM

I don't think there's a correlation between the installation of your CP and your brake noise. You should check your brake pads, they might need replacing.

gabylonfive · 04-03-2016, 12:21 PM

Quote:

Originally Posted by thkfast

I don't think there's a correlation between the installation of your CP and your brake noise. You should check your brake pads, they might need replacing.

Agreed, only thing I can think of is the vacuum line running off the intake manifold. Brake booster gets vacuum from that line so maybe double check that this vacuum connection is connected properly.

JunkyardDogg · 04-04-2016, 08:13 PM

Well it seems to have gone away

04-02-2016, 02:49 PM	#1
JunkyardDogg Captain 90 Rep 664 Posts Drives: 2011 BMW 335is E92 Join Date: Dec 2012 Location: NJ iTrader: (0)	After CP/BOV install, I get a hissing noise when hitting the brakes I get a low level hiss/air noise whenever I hit the brakes. It doesn't happen all the time. Is this normal?
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04-03-2016, 03:14 AM	#2
thkfast Major 261 Rep 1,029 Posts Drives: 2015 F82 M4 Sakhir Orange DCT Join Date: Mar 2009 Location: Cedar Rapids, IA iTrader: (1)	I don't think there's a correlation between the installation of your CP and your brake noise. You should check your brake pads, they might need replacing. __________________ "The likelihood of one individual being right increases in direct proportion to the intensity with which others attempt to prove him wrong." 2015 F82 M4 - Sakhir Orange Metallic 2013 E92 M3 / 2013 E92 335is / 2010 E90 335i / 2007 E90 335i
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04-04-2016, 08:13 PM	#4
JunkyardDogg Captain 90 Rep 664 Posts Drives: 2011 BMW 335is E92 Join Date: Dec 2012 Location: NJ iTrader: (0)	Well it seems to have gone away
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