|
|
Thread Tools | Search this Thread |
11-14-2017, 06:01 PM | #1 |
Private
28
Rep 56
Posts |
**Resolved** Help - strange noise in third and forth gear (with videos)
Hello everyone,
I have a 2017 ZCP DCT f80 M3 with a strange vibrating/grinding noise when accelerating between 2500 and 3500 rpm. Happens mostly when the vehicle is cold but have encountered the issue when warm as well. Seems to appear more often when going up hill. The car is going into service tomorrow for a ride along, but we all know sounds seem to disappear as soon as a shop Forman is in the passenger seat. Please see linked videos below. Does anyone have any idea of what could be causing this issue? Thank you so much for any replies!! Last edited by BlatantMaple854; 02-08-2018 at 09:36 PM.. Reason: Adding Issue Resolved to the title and corrected typo Error by adding the word DCT in title |
|
11-14-2017, 09:05 PM | #2 |
Skittles, OT OG
2337
Rep 649
Posts |
Really hard to tell from the video. Could be something silly like a heat shield or it could be something like a wastegate rattle. Keep us posted.
|
Appreciate
0
|
11-14-2017, 09:32 PM | #3 |
Banned
7559
Rep 5,056
Posts |
The F30 N55 cars had a similar issue. Don't know how helpful it would be but here's the thread:
http://f30.bimmerpost.com/forums/sho...d.php?t=949816 |
Appreciate
0
|
11-14-2017, 09:57 PM | #5 |
Lieutenant
387
Rep 544
Posts |
Kind of a dumb question but are you running premium .. ??
__________________
1."Luck" is an excuse for people that have failed at their mission to do something! (Allan McNish)
2. I’m not an (EXPERT) I’m just here with an opinion. So don’t hate me. (lukej) |
Appreciate
0
|
11-14-2017, 10:12 PM | #6 |
Private
28
Rep 56
Posts |
Yes, absolutely every time. I fill up at a fairly new shell gas station with premium 93. Only one time, I accidentally mixed 4 gallons of 87 with 12 gallons of 93. Which averages out to about 91.5 octane (still better than Cali gas lol)
|
Appreciate
0
|
11-16-2017, 07:58 AM | #8 |
Private
28
Rep 56
Posts |
|
Appreciate
0
|
11-16-2017, 08:21 AM | #9 |
///M You
344
Rep 619
Posts |
Definitely not normal. I tried listening for a similar sound in my car and nothing. Let us know how your dealership visit goes. Curious as to what the issue may be.
|
Appreciate
0
|
11-17-2017, 03:57 AM | #10 |
Second Lieutenant
211
Rep 293
Posts |
Weird. I had this similar noise on my old E92 M3. Seemed to be coming from somewhere in the dash. Dealer never figured it out. It never really affected performance or anything either so nothing was done in the end, and it was faint enough where you wouldn't be able to hear it if you weren't paying close attention.
|
Appreciate
0
|
11-17-2017, 07:53 AM | #11 | |
Private
28
Rep 56
Posts |
Quote:
|
|
Appreciate
0
|
11-28-2017, 08:29 AM | #14 |
Private
28
Rep 56
Posts |
Nothing definitive yet. The tech thinks it could be the carbon front splitter and lip are lose from a poor installation. They are ruling that out first before they try anything more teachnical.
I have my doubts about that being the issue... |
Appreciate
0
|
11-29-2017, 03:02 PM | #15 |
Private
28
Rep 56
Posts |
Quick Update: tightening loose bolts in the bumper did nothing. They also changed the blower motor and replaced the valvetronic motor. No change...
An engineer will be at the dealership on Friday to take a look. I am starting to get really pissed off. I’ve been without my car for over a week and a half..... |
Appreciate
0
|
02-08-2018, 09:38 PM | #16 |
Private
28
Rep 56
Posts |
Quick update for everyone. My dealer / service techs were finally able to resolve this issue after at least 4 visits with no luck. The noise was found to be only present when the ac was running. My service tech added an additional weight and clamp on the low pressure line for the ac system. The issue is 100% resolved! Hope this helps anyone in the future with the same problem.
|
Appreciate
1
cotmfk2040.50 |
02-08-2018, 11:12 PM | #17 | |
Banned
7559
Rep 5,056
Posts |
Quote:
|
|
Appreciate
1
cotmfk2040.50 |
02-08-2018, 11:20 PM | #18 |
Private
28
Rep 56
Posts |
I sure did, and I informed my SA about this back several months ago. The tech stated, “there was already a weight on there and that was not the problem.” Sure enough, the weight was not enough. They added an additional weight on the low pressure line near the firewall and that did the trick. Pretty disappointed in what I had to go through to resolve this issue...
|
Appreciate
0
|
02-08-2018, 11:22 PM | #19 | |
Banned
7559
Rep 5,056
Posts |
Quote:
|
|
Appreciate
0
|
Bookmarks |
|
|