02-07-2023, 04:43 PM | #1 |
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Tips/Advice for first time installing AA catted downpipe?
Just got my AA catted downpipe and I plan to install it myself over the weekend. I was wondering if you guys have any tips to make the install more smooth and easier. I'm also wondering if there is enough clearance to take the downpipe out with jack stands or ramps. How tall of jack stands do you guys recommend? Thanks!
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02-07-2023, 07:03 PM | #2 |
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Tips. Remove your airbox, o2 sensors, and the bracket bolts from the top. Loosen the v clamp. Jack up your car and secure it. Loosen the clamp, remove the hanger bolt. Once done you'll be able to separate the downpipe from the exhaust. Hope this helps.
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02-08-2023, 10:11 AM | #4 |
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I did it myself, took around two hours, car on jack stands, first time changing downpipe. I would rate the overall process as "very easy" with the exception of taking OEM downpipe out as there was almost zero play in the exhaust. I have X3 m40i but my reference was some random video on youtube of a guy changing downpipe on his m340i and they are identical
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02-08-2023, 12:57 PM | #5 |
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Once you have the OEM downpipe removed and ready to install the AA, secure the downpipe from the turbo to exhaust. Make sure it’s lined up and fully seated at the turbo, tighten clamp, then work your way back tightening things.
I did it in reverse (exhaust to turbo)my first go round. Ended up having to re-do it cause I was leaking exhaust from the turbo. Wasn’t enough to throw codes, but couldn’t drive with the windows closed.
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02-09-2023, 01:21 AM | #6 | |
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02-09-2023, 10:24 AM | #7 | |
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02-09-2023, 10:39 AM | #8 |
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i did it myself with jackstands and it was pretty easy, the toughest part was my v-band clamp was sort of stuck on the turbo, but after messing with it for a while, i was able to get it off.
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02-09-2023, 03:30 PM | #9 |
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Thanks for the help! How did you notice the leak from the turbo? Was the smell really bad?
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02-09-2023, 07:53 PM | #10 |
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It was noticeable in cabin when at a stop and the windows closed. I thought it was cat settling at first, until it wasn’t going away. I was able to see faint whisps of exhaust coming from the behind the turbo when I looking under the hood. No matter of tightening the V band made it go away. So ended up redoing the whole install and it’s been fine since.
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09-16-2023, 08:33 PM | #11 | |
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09-17-2023, 10:36 AM | #12 |
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If it's a stong smell, then its a leak. It should be minimal to no smell with the high flow catted AA.
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09-17-2023, 10:54 AM | #13 |
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Thanks Mike! The smell is strong but took some pics. Does this look good?
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09-17-2023, 11:44 AM | #14 |
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Did you intentionally loosen the clamp to take a picture or is that how it's currently installed?
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09-17-2023, 03:18 PM | #15 |
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09-17-2023, 03:20 PM | #16 |
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And did you remove the original gasket that sometimes sticks up in place when removing the oem DP?
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09-17-2023, 08:10 PM | #17 |
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Thanks for all the replies!
I loosened the vband to take a pic. I’m just wondering if the gap in the pic is really a gap. I installed the supplied gasket from AA. OEM dp gasket is stuck to the OEM DP so good there too |
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09-18-2023, 08:34 AM | #18 | |
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When you install you AA loosen the bottom downpipe where it connects to the exhaust. Tighten V band first and after tighten bottom exhaust. What happens sometimes is you tighten bottom and it can not fully connect on Vband connection, because its already tighten in place and can not move. I also had a small gap between turbo and downpipe. After doing what I mentioned vibration was gone. Also what torque spec you are using to tighten Vband?
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09-18-2023, 01:19 PM | #19 | |
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09-18-2023, 02:30 PM | #20 |
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There is a gasket? I didnt had no gasket
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09-18-2023, 08:08 PM | #22 |
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wtf I had no zip on it. perhaps it was already applied or something. I mean it is working as expected and I dont see any leaks. I do smell a little on start up but I think its normal
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