MPPSK no exhaust valve rattle

bimmer456 · 05-18-2018, 02:49 PM

So I used to have a rattle coming from the exhaust flap on the stock exhaust when cold starting that has gone away with the mppsk. Looks like the valve is better and doesn't rattle it's just louder now

CruzM3 · 05-18-2018, 04:53 PM

Wouldn't say your out of the woods yet. My 340i w/MPPSK has an exhaust rattle on the passenger side.

TYE · 05-21-2018, 03:08 PM

Why does the valve rattle in the first place? That sounds like a cheap valve or bad linkage in the valve. I have no valve rattle at all on my GT3 with full headers, high flow cats and muffler bypass.

Has anyone explored changing out the valve to a higher quality valve?

Derek80 · 05-22-2018, 11:36 AM

My mppsk with high flow dp has the cheap rattle sound during gears change in comfort mode, it goes away in sport mode. Not sure if unplug both valves when they open would fix this.

CruzM3 · 05-22-2018, 12:23 PM

Just found out today from my dealer service center that I have a bad part by the valve. (German trying to tell me whats wrong in english) I think they mean the part that controls the valve but after I have it fixed Friday after next I will report back with the actual fix. It mostly happens on cold start but I also get the rattle in any mode while driving.

eric97h · 04-27-2019, 01:25 AM

Quote:

Originally Posted by TYE

Why does the valve rattle in the first place? That sounds like a cheap valve or bad linkage in the valve. I have no valve rattle at all on my GT3 with full headers, high flow cats and muffler bypass.

Has anyone explored changing out the valve to a higher quality valve?

have you ever fixed this my car does this as well in comfort it has some buzzing sound in low rpms and when i start it in cold start it has rattling and weird noises i have mppsk and high flow donwpipe as well!

mode.grau · 03-23-2022, 05:29 PM

Quote:

Originally Posted by Derek80

My mppsk with high flow dp has the cheap rattle sound during gears change in comfort mode, it goes away in sport mode. Not sure if unplug both valves when they open would fix this.

Quote:

Originally Posted by CruzM3

Just found out today from my dealer service center that I have a bad part by the valve. (German trying to tell me whats wrong in english) I think they mean the part that controls the valve but after I have it fixed Friday after next I will report back with the actual fix. It mostly happens on cold start but I also get the rattle in any mode while driving.

Quote:

Originally Posted by eric97h

have you ever fixed this my car does this as well in comfort it has some buzzing sound in low rpms and when i start it in cold start it has rattling and weird noises i have mppsk and high flow donwpipe as well!

Did anyone ever find a good solution to this problem? I've got a catless setup with my MPPSK and the valve rattles both during comfort mode shifts, as well as under certain exhaust load/flow at certain RPMs in sport mode. It's really irritating and takes away all the enjoyment, I'm always keeping RPMs low to avoid the nasty rattling noise.

maminean · 11-16-2023, 09:23 AM

Quote:

Originally Posted by mode.grau

Did anyone ever find a good solution to this problem? I've got a catless setup with my MPPSK and the valve rattles both during comfort mode shifts, as well as under certain exhaust load/flow at certain RPMs in sport mode. It's really irritating and takes away all the enjoyment, I'm always keeping RPMs low to avoid the nasty rattling noise.

Same problem. Did you figure it out? It’s undrivable.

andyb313 · 11-16-2023, 10:26 AM

Quote:

Originally Posted by bimmer456

So I used to have a rattle coming from the exhaust flap on the stock exhaust when cold starting that has gone away with the mppsk. Looks like the valve is better and doesn't rattle it's just louder now

I thought I had a valve rattle before and it ended up being a tiny stone inside the exhaust!

maminean · 11-17-2023, 01:31 PM

Quote:

Originally Posted by andyb313

I thought I had a valve rattle before and it ended up being a tiny stone inside the exhaust!

That’s wild! And it didn’t make a sound before the Downpipe went on?
How did you get it out?

Anton

andyb313 · 11-17-2023, 04:36 PM

Quote:

Originally Posted by maminean

That’s wild! And it didn’t make a sound before the Downpipe went on?
How did you get it out?

Anton

I thought it was the valve and the car was under warranty at the time . Not sure how it got in there!
I let BMW do it under warranty and they kindly charged me £100 diagnostic fee because it's not a fault with the exhaust

05-18-2018, 02:49 PM	#1
bimmer456 Major General 2990 Rep 6,037 Posts Drives: 340i Join Date: Nov 2016 Location: Pasadena, CA iTrader: (0)	MPPSK no exhaust valve rattle So I used to have a rattle coming from the exhaust flap on the stock exhaust when cold starting that has gone away with the mppsk. Looks like the valve is better and doesn't rattle it's just louder now
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05-18-2018, 04:53 PM	#2
CruzM3 Captain 284 Rep 703 Posts Drives: 2018 M3 "Velocity Edition" Join Date: Apr 2016 Location: Düsseldorf, Germany iTrader: (0)	Wouldn't say your out of the woods yet. My 340i w/MPPSK has an exhaust rattle on the passenger side. __________________ 2018 M3 ZCP "Edition Velocity" 2018 X3 30i (wife’s) 2017 340i w/ MPPSK & Many M Performance Parts (sold) 2016 328i (sold)
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05-21-2018, 03:08 PM	#3
TYE Private First Class 81 Rep 128 Posts Drives: 997 GT3, '18 440i GC Join Date: Jul 2008 Location: Bay Area iTrader: (0)	Why does the valve rattle in the first place? That sounds like a cheap valve or bad linkage in the valve. I have no valve rattle at all on my GT3 with full headers, high flow cats and muffler bypass. Has anyone explored changing out the valve to a higher quality valve?
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05-22-2018, 11:36 AM	#4
Derek80 Enlisted Member 8 Rep 49 Posts Drives: 440i Join Date: Sep 2017 Location: Toronto iTrader: (0)	My mppsk with high flow dp has the cheap rattle sound during gears change in comfort mode, it goes away in sport mode. Not sure if unplug both valves when they open would fix this.
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05-22-2018, 12:23 PM	#5
CruzM3 Captain 284 Rep 703 Posts Drives: 2018 M3 "Velocity Edition" Join Date: Apr 2016 Location: Düsseldorf, Germany iTrader: (0)	Just found out today from my dealer service center that I have a bad part by the valve. (German trying to tell me whats wrong in english) I think they mean the part that controls the valve but after I have it fixed Friday after next I will report back with the actual fix. It mostly happens on cold start but I also get the rattle in any mode while driving. __________________ 2018 M3 ZCP "Edition Velocity" 2018 X3 30i (wife’s) 2017 340i w/ MPPSK & Many M Performance Parts (sold) 2016 328i (sold)
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