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      11-17-2017, 10:06 AM   #1
Toneaero
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X5M Exhaust valve/flap not opening?

Anyone know where the vacuum pump is located for the exhaust flap in the OEM exhaust? When I hit the "M" button, the valve normally opens but I believe the pump needs to be replaced as it no longer opens on cold starts, WOT, and when I activate M mode.
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      11-17-2017, 10:42 AM   #2
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Quote:
Originally Posted by Toneaero View Post
Anyone know where the vacuum pump is located for the exhaust flap in the OEM exhaust? When I hit the "M" button, the valve normally opens but I believe the pump needs to be replaced as it no longer opens on cold starts, WOT, and when I activate M mode.
I had this problem. It was as simple as lubing up the actuator. Get under there and see the flap actuator from the outside of the exhaust, see if it is tough to move. Add WD-40, DONE!
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      11-17-2017, 10:55 AM   #3
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Originally Posted by Naz24 View Post
I had this problem. It was as simple as lubing up the actuator. Get under there and see the flap actuator from the outside of the exhaust, see if it is tough to move. Add WD-40, DONE!
Iíll try that trick but I was able to actuate the valves with my hand. Iím thinking itís the pump. I followed the vacuum lines and I donít see any cracks or loose connections. I lose sight of the line when it disappears behind the bumper area.
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      11-17-2017, 11:13 AM   #4
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Quote:
Originally Posted by Toneaero View Post
Quote:
Originally Posted by Naz24 View Post
I had this problem. It was as simple as lubing up the actuator. Get under there and see the flap actuator from the outside of the exhaust, see if it is tough to move. Add WD-40, DONE!
Iíll try that trick but I was able to actuate the valves with my hand. Iím thinking itís the pump. I followed the vacuum lines and I donít see any cracks or loose connections. I lose sight of the line when it disappears behind the bumper area.
Yeah I was able to actuate mine as well, but it took some force. Try lubing it and let me know how it works out!
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      11-17-2017, 02:39 PM   #5
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I had this exact issue, line was pinched, it was fixed by dealer, 5 min job - they didn't even charge me anything since I was already there getting an oil change.
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      11-17-2017, 03:53 PM   #6
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Originally Posted by cbakking View Post
I had this exact issue, line was pinched, it was fixed by dealer, 5 min job - they didn't even charge me anything since I was already there getting an oil change.
Line was pinched? Do you recall where? Did you get a CEL from it?
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      11-17-2017, 04:59 PM   #7
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Please see this thread - http://www.xbimmers.com/forums/showthread.php?t=1295996
I didn't actually saw where it was exactly pinched but tech told me it was near rear bumper.
And I did get a CEL whenever I punch the car CEL - 69203 checked faults - 310B - I think it's related to vacuum.
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      11-18-2017, 12:04 AM   #8
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2015 M3  [4.76]
Tie the arm with wire so that the flap remains open at all times. Problem solved.
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