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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Downpipe fitment issue (v-clamp won't close)



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      01-12-2013, 10:43 PM   #1
blaze739
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2008 BMW 335i  [4.67]
Downpipe fitment issue (v-clamp won't close)

So I finally got around to installing my downpipes but I am having a issue with the longer downpipe (front turbo). I can't get the v-clamp to close on the pipe/turbo flanges because the Downpipe flange doesn't sit flush against the turbo. On one side it is flush, but on the other side there is a small gap about halfway around the pipe. Even though the v-clamp grabs both, it does not close because the flanges are not tight enough.

Has anyone encountered this? Are there any suggestions or do I need to replace the downpipe because of a poor fit? I will try posting pictures tomorrow. Thanks in advance for the help.
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      01-13-2013, 11:09 AM   #2
saxon
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could possibly deck the flange on the new downpipe for a better fit
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      01-13-2013, 12:16 PM   #3
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Heard that part is tough for some people here ...... which DP is this ?
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      01-13-2013, 01:50 PM   #4
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If the V band is out of round or warped it will likely never fit. Perhaps you want to contact the manufacturer and tell them.
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      01-25-2013, 09:28 AM   #5
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turned out to be a defective pipe. i swapped it out for a different one and everything it great now. v-clamp is closed to about 1/4" with nothing touching. No noises or vibrations and im loving the new feel. i never realized the sound of the turbos would become so much more noticable. can't wait to test the additional power once it gets above 10 degrees in NY
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      01-25-2013, 09:47 AM   #6
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I had a similar issue, the clamp was slightly warped and was very close to starting to thread but wouldnt. After 3+ hours i ended up making sure it was completely on, then using pliers to close it. It worked perfectly and without much resistance. No exhaust leak after several hundred miles
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      01-25-2013, 12:42 PM   #7
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Did the same thing. Used pliers to close the gap, no exhaust leak so far (~10,000 miles)
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      01-25-2013, 01:18 PM   #8
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any smells in the cabin at all? the awful new downpipe smell went away after 2 days, but i still get a burning smell when i park in the garage. i'm thinking it might need a few more days unless i have a leak. everything sounds good tho.
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      01-25-2013, 01:20 PM   #9
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Did you clean the pipes before you were done?
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      01-25-2013, 04:01 PM   #10
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What pipes were these for reference?
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      01-25-2013, 09:35 PM   #11
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Quote:
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Did you clean the pipes before you were done?
Nope. I wasn't looking for any extra steps to the install lol. That could be it
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      01-25-2013, 09:44 PM   #12
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Quote:
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Did you clean the pipes before you were done?
Uhm what????? We were supposed to?
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      01-26-2013, 08:41 AM   #13
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Quote:
Originally Posted by Eric335 View Post
I had a similar issue, the clamp was slightly warped and was very close to starting to thread but wouldnt. After 3+ hours i ended up making sure it was completely on, then using pliers to close it. It worked perfectly and without much resistance. No exhaust leak after several hundred miles
Small vice grips work too
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      01-26-2013, 12:10 PM   #14
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Small vice grips work too
Very true. At that point of the install i was about to kick the damn car off the jack stands and sell it hahahah
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      01-29-2013, 11:59 PM   #15
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Had same problem. Got new v clamps from dealer for $16 each and fit perfect. Old ones got warped
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