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2007 MINI Cooper S

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Unread 05-17-2017, 06:34 PM #1
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Weird sound coming from the car.

So the other day I noticed a sound coming from somewhere in the car. It sounds like under the car but my friend also said it sounds like the around the engine. It only happens around 1400-2100 rpms in every gear. But it only happys when I let up around that or sometime around when I shift at 4k. It makes a "Tsssst" sound. Sometimes long and other really short. I put a video for reference. I just recently put in thr alta air intake and a OBX Catless Down Pipe and deletes the resonator. And only started to happen after the downpipe and resornator delete.

https://youtu.be/slRwd2Bdk6M

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Unread 05-17-2017, 07:38 PM #2
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Weird sound coming from the car.
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Weird sound coming from the car.
Sounds like a heat shield rattle to me, get the car up in the air and bump the exhaust with a rubber mallet till you can locate the source of the sound.
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Unread 05-17-2017, 10:57 PM #3
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Weird sound coming from the car.
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Weird sound coming from the car.
Not sure myself. I have the Alta intake and a Miltek exhaust, but I did have a heat shield rattle that was pretty easily taken care of before the two of those mods happened.

I will say that the Alta intake does make for a much louder whoosh and blow off when under load, though you'll have to be lugging the engine a bit to hear it. I did also get a GFB diverter valve which reduced that somewhat.

I'm not sure that's what I'm hearing though, so look at the heat shield first.
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Unread 05-18-2017, 07:01 PM #4
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It is hard to tell from that clip, but to me, it sounds like the diverter valve releasing pressure. That would be a normal sound. Without actually standing next to the car, that's the best response I can give.

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Unread 05-18-2017, 07:11 PM #5
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Weird sound coming from the car.
I can't tell.
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