11-13-2017, 09:43 AM | #1 |
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X5 50i Loud Noise Upon Cold Start
I've started to hear a loud noise every time I start my cold engine that sounds like the pressure being released from a large truck with air brakes.
Only happens with a cold engine. Any ideas what this might be? Thanks in advance for your help. |
11-14-2017, 09:09 AM | #2 |
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video?
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2011 BMX X5 Xdrive50i - 127K - No muffler, BMS Stage 1
2005 Jeep Grand Cherokee 5.7L V8-Her stock DD 1995 Ford Thunderbird 4.6 V8 LX - A bunch of mods BMW guys don't care about 1995 BMW 540i6 - H&R Lowering Springs, Bilstein's, Racing Dynamics Bars, Catback, Short shifter |
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11-17-2017, 09:40 AM | #5 |
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These could be two different sounds from two different failures.
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2011 BMX X5 Xdrive50i - 127K - No muffler, BMS Stage 1
2005 Jeep Grand Cherokee 5.7L V8-Her stock DD 1995 Ford Thunderbird 4.6 V8 LX - A bunch of mods BMW guys don't care about 1995 BMW 540i6 - H&R Lowering Springs, Bilstein's, Racing Dynamics Bars, Catback, Short shifter |
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11-20-2017, 07:41 AM | #6 |
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Mine's done it twice in a month, more like a half-second loud screech/chirp (similar to OP description), if I had to guess I'd say starter...
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2013 X5M AW/Blk
Build Thread: https://www.xbimmers.com/forums/show....php?t=1499820 |
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