Akrapovic Issues

sultanattar · 01-03-2014, 02:11 PM

I recently purchased an Akrapovic exhaust from my dealer. After they installed it, I realized that when the car is cold there is some sort of steel rattling coming from under the driver seat and once the car is warmed up it goes away. However when driving at low RPM on a high gear you hear some metal rattling again once you try to accelerate on the same gear between 1500 - 2000 RPM. The dealer took down the exhaust and installed it again but the sound is still there. I am going tomorrow again to demonstrate the sound but has anyone experienced this before?

bigfra · 01-03-2014, 03:04 PM

Could be one of the rubber mounts is worn and it just needs replaced, would have thought the tech would have noticed that though

greentrbo95gst · 01-03-2014, 03:34 PM

It's the crush metal gaskets between the dowpipes and exhaust. They should be replaced when replacing the exhaust or downpipes. GL

sultanattar · 01-03-2014, 03:39 PM

thanks, I will check with them tomorrow. Would that also effect the power of the car? I have realized a loss in power recently

greentrbo95gst · 01-03-2014, 03:41 PM

It shouldnt. Throw it on a dyno. You have to order new gaskets first. They are tricky to install.

boots · 01-04-2014, 09:02 AM

Give your ecu time to get used to the new exhaust. If you feel you lost power, it will come back. Also, the pipe will sound better once it is broken in.

sultanattar · 01-04-2014, 01:43 PM

I had the exhaust on for almost 3 months, it has settled in. The gasket is what the dealer said they will try however the loss of power is something I have experienced for a week now

us_matrix · 01-04-2014, 01:57 PM

Quote:

Originally Posted by sultanattar

I had the exhaust on for almost 3 months, it has settled in. The gasket is what the dealer said they will try however the loss of power is something I have experienced for a week now

OP, please let us know what they find out as I am going to install my Akra exhaust next week. Need to ask them to replace the gasket between down and link pipe.

jmh · 01-04-2014, 04:11 PM

Quote:

Originally Posted by sultanattar

I had the exhaust on for almost 3 months, it has settled in. The gasket is what the dealer said they will try however the loss of power is something I have experienced for a week now

Maybe the vacuum lines for the exhaust valves have either loosen up / started leaking (due to incorrect installation) ?

mstmng · 01-04-2014, 05:28 PM

Quote:

Originally Posted by jmh

Maybe the vacuum lines for the exhaust valves have either loosen up / started leaking (due to incorrect installation) ?

my friend had this problem with e-race, so very likely it could be solution

01-03-2014, 02:11 PM	#1
sultanattar Enlisted Member 7 Rep 36 Posts Drives: 2013 f10 M5 Join Date: Jan 2013 Location: Saudi Arabia iTrader: (0)	Akrapovic Issues I recently purchased an Akrapovic exhaust from my dealer. After they installed it, I realized that when the car is cold there is some sort of steel rattling coming from under the driver seat and once the car is warmed up it goes away. However when driving at low RPM on a high gear you hear some metal rattling again once you try to accelerate on the same gear between 1500 - 2000 RPM. The dealer took down the exhaust and installed it again but the sound is still there. I am going tomorrow again to demonstrate the sound but has anyone experienced this before?
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01-03-2014, 03:04 PM	#2
bigfra Second Lieutenant 129 Rep 297 Posts Drives: 991s , M5 Comp pack Join Date: Dec 2013 Location: Glasgow, Scotland iTrader: (0)	Could be one of the rubber mounts is worn and it just needs replaced, would have thought the tech would have noticed that though
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01-03-2014, 03:34 PM	#3
greentrbo95gst Brigadier General 1231 Rep 4,106 Posts Drives: 21 M5 Comp Join Date: Jan 2011 Location: Orange County iTrader: (6)	It's the crush metal gaskets between the dowpipes and exhaust. They should be replaced when replacing the exhaust or downpipes. GL __________________ Current: 21 M5 Comp, 17 X5M, 06 M3, 14 Ferrari FF, Tesla Model S Performance.
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01-03-2014, 03:39 PM	#4
sultanattar Enlisted Member 7 Rep 36 Posts Drives: 2013 f10 M5 Join Date: Jan 2013 Location: Saudi Arabia iTrader: (0)	thanks, I will check with them tomorrow. Would that also effect the power of the car? I have realized a loss in power recently
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01-03-2014, 03:41 PM	#5
greentrbo95gst Brigadier General 1231 Rep 4,106 Posts Drives: 21 M5 Comp Join Date: Jan 2011 Location: Orange County iTrader: (6)	It shouldnt. Throw it on a dyno. You have to order new gaskets first. They are tricky to install.
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01-04-2014, 09:02 AM	#6
boots Curve Thrasher 623 Rep 3,773 Posts Drives: 2013 Bmw m5..White/Blk. Join Date: Nov 2012 Location: Cypress Tx iTrader: (0)	Give your ecu time to get used to the new exhaust. If you feel you lost power, it will come back. Also, the pipe will sound better once it is broken in. __________________ 2013 Bmw M5-Alpine White/Black-Oem gloss blk powder coated wheels-Expel clear bra-35% tint-Rpi Gtm Exhaust-Rpi Downpipes-Rpi Scoops-Halim Cazimi Performance Tune-KwV3 coilovers Country run
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01-04-2014, 01:43 PM	#7
sultanattar Enlisted Member 7 Rep 36 Posts Drives: 2013 f10 M5 Join Date: Jan 2013 Location: Saudi Arabia iTrader: (0)	I had the exhaust on for almost 3 months, it has settled in. The gasket is what the dealer said they will try however the loss of power is something I have experienced for a week now
	Appreciate 0 Quote