NLS and the car got louder?

veer90

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Nov 16, 2016
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West Nyack, NY
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e90 335i 6MT
I'm not talking a little louder, like 3x louder just normal cruising. Almost like I blew a hole in my exhaust (have full turbo back resonated straight pipe). Happened last night after I no lift shifted 3-4 and it shot a huge fireball out the back.

Weird thing is I drove it this morning and it seems to get louder as it warms up, almost like there's a leak that shows itself with heat. At first I thought a wastegate stuck open but it boosts fine.

Where to start checking? No codes either.
 

veer90

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Nov 16, 2016
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West Nyack, NY
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e90 335i 6MT
Could have blew/burnt the packing out of the resonator?

Forgot to mention the extra noise seems to be coming from the back of motor / transmission area. I'm familiar with blowing packing out the exhaust but this sounds more like an exhaust leak.

My friend said I should check vbands. Do they pop with excessive pressure?
 

veer90

Lieutenant
Nov 16, 2016
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West Nyack, NY
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e90 335i 6MT
Fixed a bad vband and the car's back to normal. The nut backed off because the t-bolt was too long lol
 

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