Akrapovic Exhaust Valve Rattle-Proper Fix

euklid · 07-06-2018, 08:32 AM

Hello there everyone,

So the other day I made a thread looking for an exhaust and eventually decided to buy Hope's Akrapovic.

First impression were good, like the sound, the transaction was smooth, Hope kept me uptodate. We met in Manchester at his mates garage and swapped the exhausts from one car to the other. This took place on Tuesday. Tomorrow my old stock exhaust is being picked up through shiply and brought back to me.

Anyhoo, yesterday my wife noticed a rattling sound coming from the back and low & behold it was the valve issue, the driver's side flap was too loose and it was rattling. Looked everywhere here and on the web, could not find a fix, everyone was talking about either fixing it through the warranty or strip wiring the valve permanently open. At that point I contacted Hope to give him his exhaust back and that is where things started going south. He would not acknowledge the fault and would not accept a return, he also refused to give me his BMW fitment receipt which he had promised to send over ever since I bought the exhaust which I thought was a bit fishy as he had a picture of the receipt on his phone and put it on a message to send it to me right in front of me but then decided to "scan it when he gets home". I am still waiting for that receipt.

He did however promise to contact BMW and Akrapovic and try to get them to fix it under warranty.

Needless to say I could not sleep last night so kept on working on my car to fix that issue and thankfully I did.

Here is the proper fix and hopefully that will help others with the same issue.

Dwaynos · 07-10-2018, 04:50 PM

A quick tip for you mate, don't put your tools on the car, it is not a work bench and you will scratch the paint.

Great video though, very simple fix, I'm shocked that people are replacing exhausts for this.

It won't be a problem for me though, i can't afford and akrapovic.

Thanks for sharing.

euklid · 07-10-2018, 04:54 PM

Quote:

Originally Posted by Dwaynos

A quick tip for you mate, don't put your tools on the car, it is not a work bench and you will scratch the paint.

Yeap thought about that later, it was a nervous move to put them there while I was holding the camera for the first time ever. Felt upset about it later.

Quote:

Great video though, very simple fix, I'm shocked that people are replacing exhausts for this.

Thank you mate.

Quote:

It won't be a problem for me though, i can't afford and akrapovic.

I'm pretty sure you can pick up a used one for relatively cheap like 2,5-3k

Quote:

Thanks for sharing.

My pleasure!

MosTunKNowN · 06-19-2021, 12:24 PM

Hi guys. Just found only this thread about problem and fix with akrapovic problem on M5.
I have another problem - right valve doesn't work. On valve i found (look on pic) that this "Pierburg" and tried to find 7.221.51.18 and no results :/
May be this valve can work from other auto ?

celicatoe46m3 · 06-20-2021, 09:28 AM

I'm going to try this fix as well. Can it still be done with the bumper on and the AKRA tips on? I'll try to remove the tips to see if I can get better access to it.

bongshi4 · 06-21-2021, 01:23 PM

Quote:

Originally Posted by MosTunKNowN

Hi guys. Just found only this thread about problem and fix with akrapovic problem on M5.
I have another problem - right valve doesn't work. On valve i found (look on pic) that this "Pierburg" and tried to find 7.221.51.18 and no results :/
May be this valve can work from other auto ?

Hey,

I'm having a similar issue with my akrapovic vacuum valve also.

This is the one I found from your picture.
Product number is correct, 7.22151.18!!
But last 6 digits with T in the middle is different.

https://www.powersprint24.de/unterdruckdose-905674.html

MosTunKNowN · 06-21-2021, 01:28 PM

Quote:

Originally Posted by bongshi4

Quote:

Originally Posted by MosTunKNowN

Hi guys. Just found only this thread about problem and fix with akrapovic problem on M5.
I have another problem - right valve doesn't work. On valve i found (look on pic) that this "Pierburg" and tried to find 7.221.51.18 and no results :/
May be this valve can work from other auto ?

Hey,

I'm having a similar issue with my akrapovic vacuum valve also.

This is the one I found from your picture.
Product number is correct, 7.22151.18!!
But last 6 digits with T in the middle is different.

https://www.powersprint24.de/unterdruckdose-905674.html

I found one number from porsche and waiting answer from guy which tried it.

celicatoe46m3 · 07-11-2021, 09:44 AM

OK I solved my rattle problem.

I basically unplugged the rubber line, plugged it with a golf tee, ziptied it, and tucked it away.

Then I forced the valve to be open with another ziptie. And now it doesn't rattle at 1800rpm on liftoff.

bongshi4 · 10-27-2021, 06:37 AM

Quote:

Originally Posted by MosTunKNowN

I found one number from porsche and waiting answer from guy which tried it.

Hey,

I'm not sure if you already have tried the new valve... but I finally got one from Design911
(https://www.design911.co.uk/fu/prod1...urce=doofinder)

Which is not the original parts for Porsche, but the OEM one which gives much less price.

Anyway, I took the original Akra valve today and compared those two, and those are ALMOST identical (only mm different on 3 bolts which are for the mounting)

I will post another one with actual measurement!

BBHMM · 10-28-2021, 02:33 PM

I hope it will help cuz my Akra is rattle crazy(I have DP installed)

bongshi4 · 11-03-2021, 03:05 AM

Quote:

Originally Posted by bongshi4

Hey,

I'm not sure if you already have tried the new valve... but I finally got one from Design911
(https://www.design911.co.uk/fu/prod1...urce=doofinder)

Which is not the original parts for Porsche, but the OEM one which gives much less price.

Anyway, I took the original Akra valve today and compared those two, and those are ALMOST identical (only mm different on 3 bolts which are for the mounting)

I will post another one with actual measurement!

Gents,

I was too lazy to take a measurement… but I did install it today to replace the faulty one, and it fit perfectly with no trouble!

So if your akra valve ever goes bad, this might be the solution.

07-06-2018, 08:32 AM	#1
euklid New Member 15 Rep 13 Posts Drives: BMW M5 F10 Join Date: Jul 2018 Location: Cambridge iTrader: (0)	Akrapovic Exhaust Valve Rattle-Proper Fix Hello there everyone, So the other day I made a thread looking for an exhaust and eventually decided to buy Hope's Akrapovic. First impression were good, like the sound, the transaction was smooth, Hope kept me uptodate. We met in Manchester at his mates garage and swapped the exhausts from one car to the other. This took place on Tuesday. Tomorrow my old stock exhaust is being picked up through shiply and brought back to me. Anyhoo, yesterday my wife noticed a rattling sound coming from the back and low & behold it was the valve issue, the driver's side flap was too loose and it was rattling. Looked everywhere here and on the web, could not find a fix, everyone was talking about either fixing it through the warranty or strip wiring the valve permanently open. At that point I contacted Hope to give him his exhaust back and that is where things started going south. He would not acknowledge the fault and would not accept a return, he also refused to give me his BMW fitment receipt which he had promised to send over ever since I bought the exhaust which I thought was a bit fishy as he had a picture of the receipt on his phone and put it on a message to send it to me right in front of me but then decided to "scan it when he gets home". I am still waiting for that receipt. He did however promise to contact BMW and Akrapovic and try to get them to fix it under warranty. Needless to say I could not sleep last night so kept on working on my car to fix that issue and thankfully I did. Here is the proper fix and hopefully that will help others with the same issue.
	Appreciate 3 core22139.50 M5_Adis221.50 1320racer135.00 Tweet Quote

07-10-2018, 04:50 PM	#2
Dwaynos Captain 380 Rep 948 Posts Drives: F10 M5 Monte Carlo Blue Join Date: May 2018 Location: UK iTrader: (0)	A quick tip for you mate, don't put your tools on the car, it is not a work bench and you will scratch the paint. Great video though, very simple fix, I'm shocked that people are replacing exhausts for this. It won't be a problem for me though, i can't afford and akrapovic. Thanks for sharing.
	Appreciate 0 Quote

06-19-2021, 12:24 PM	#4
MosTunKNowN New Member 2 Rep 9 Posts Drives: F10 M5 Join Date: Jan 2013 Location: KZ iTrader: (0)	Hi guys. Just found only this thread about problem and fix with akrapovic problem on M5. I have another problem - right valve doesn't work. On valve i found (look on pic) that this "Pierburg" and tried to find 7.221.51.18 and no results :/ May be this valve can work from other auto ? Attached Images
	Appreciate 0 Quote

06-20-2021, 09:28 AM	#5
celicatoe46m3 Private First Class 47 Rep 170 Posts Drives: E60 M5 & E46 M3 Join Date: Dec 2010 Location: Vancouver iTrader: (3)	I'm going to try this fix as well. Can it still be done with the bumper on and the AKRA tips on? I'll try to remove the tips to see if I can get better access to it.
	Appreciate 0 Quote

07-11-2021, 09:44 AM	#8
celicatoe46m3 Private First Class 47 Rep 170 Posts Drives: E60 M5 & E46 M3 Join Date: Dec 2010 Location: Vancouver iTrader: (3)	OK I solved my rattle problem. I basically unplugged the rubber line, plugged it with a golf tee, ziptied it, and tucked it away. Then I forced the valve to be open with another ziptie. And now it doesn't rattle at 1800rpm on liftoff.
	Appreciate 0 Quote

10-28-2021, 02:33 PM	#10
BBHMM Private First Class 34 Rep 109 Posts Drives: 550i Join Date: Oct 2016 Location: Chicago iTrader: (0)	I hope it will help cuz my Akra is rattle crazy(I have DP installed)
	Appreciate 0 Quote