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      10-16-2019, 05:00 PM   #1
therealm3
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6MT clutch issues from a start

Hello,

I am having an issue with my new to me 2016 340 with a manual. This is my second manual F30, previous was a 2014 335, and have had a long line of manual bmws prior to this. Been driving with three pedals for 20+ Years. So with that said please save the learn to drive comments. Hahahha

My problem is the clutch will shudder/chatter as I take off from a stop in first gear, but only after it has been driven for awhile. When it is cold it is smooth and I barley have to give it any gas to get going. After awhile though it starts to shudder with the same input and I have to add more rpm or start to slip it a tiny bit so the car rolls and then push the clutch in all the way and let it out like normal. If I have been in traffic for a long time it's brutal. To get it not to chatter I have to slip it a ton with 1500+ rpm and I don't like doing that cause it's causing unnecessary wear and heating the clutch up that much more. Shifts into higher gears once moving are fine. It doesn't slip and is smooth.

Anyone else have similar characteristics? My last f30 didn't do this so I am wondering if maybe the previous owner wasn't so nice to the car. It is a CPO so I can take it to the dealer but I know this is going to be an uphill battle because it is fine when cold. And they don't tend to spend a lot of time looking into issues.
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      10-16-2019, 07:01 PM   #2
SteveInfante
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If it's not mounts then maybe bleed the clutch line. You may have an air bubble.
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      10-16-2019, 07:39 PM   #3
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I also have a 2014 335i and I get that too. I've found that avoiding unnecessarily heating up the clutch helps a lot. Other than that, just revving it to about 2k, releasing the throttle, then releasing the clutch while engine revs seems to avoid this problem.
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      10-17-2019, 01:30 AM   #4
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My car has been driven so gently. I hear a slight chatter hear and there. Isn't it a dual mass fly wheel ?
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      10-17-2019, 02:41 AM   #5
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My first thought is throw-out bearing
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      10-17-2019, 10:44 AM   #6
therealm3
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Interesting points about the throw out bearing. Hadn't thought about that. Maybe as it heats up it it sticking a bit. My thoughts were the friction material on the clutch grabs more as it is hotter like a high temp brake pad. I dunno. It's super annoying though and I am not excited about dealing with the "can't replicate the issue" back and forth with the dealer.
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      10-17-2019, 10:58 AM   #7
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Call service dept, explain problem and ask if when you bring it in they could go for a ride while it’s hot?
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      10-17-2019, 01:09 PM   #8
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My car does that after its been driven for over an hour and going up the drive way.
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      10-17-2019, 02:45 PM   #9
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Mine does the same. It's a lot better in comfort over sport mode. Just need to add a little more gas and try to remember the bite point to reduce the chatter
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      10-17-2019, 06:00 PM   #10
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I've had this on my car since I got it new & I always just attributed it to being the normal operation of the clutch. The car is at 42,000 kilometres now. I'm going to try & get around to deleting my clutch delay valve before winter & see if that helps anything, a lot of people have said it improves the driving experience quite a bit.
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      10-17-2019, 07:38 PM   #11
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Have this on my 328i and 135i before that. Typically after a long drive and especially after a lot of start and stop traffic. I suspect the clutch gets too hot with hotspots and causes the judder.
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      10-17-2019, 10:43 PM   #12
therealm3
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Quote:
Originally Posted by pc83 View Post
Have this on my 328i and 135i before that. Typically after a long drive and especially after a lot of start and stop traffic. I suspect the clutch gets too hot with hotspots and causes the judder.
Hmmm. This is the first clutch I have had that behaved this way. Had other issues in the past, but not this. I feel a little better that others struggle with it too, but bums me out cause it's less likely I will get a fix out of the dealer. It sucks cause the engagement when it's cold is so smooth and requires very little throttle.
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      10-18-2019, 09:31 AM   #13
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I have this same exact issue on my m235i. but not at all on my wife's 335i (currently 55k). my m235i has been like this since I got it at 14k, currently at 34k.
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      10-18-2019, 03:40 PM   #14
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My 2012 328i does this too. It's very strange. It doesn't happen on every drive, but I'd say it happens a few times a week when I daily drive it. It was much more noticeable when the weather was hot and humid. I took a trip to SC back in May with it, and it would do it right when I started driving it in the morning. I'm at the point where I'm blaming it on the clutch getting warm, however, it doesn't happen that often when I'm in rush hour traffic. As you can tell, it's confusing
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      10-20-2019, 09:50 AM   #15
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I have a 2016 340i and my car does this mainly in sport mode after about an hour of driving as well. I've driven cars with a 6 puck kevlar clutch and the only thing I can say is it's reminiscent of that, so maybe it just means when the clutch material gets hot it just becomes super sticky. It is rather annoying tho when it first starts because then u need to recalibrate and add some gas on takeoff.
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      10-21-2019, 04:26 PM   #16
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I experience the same after a lot of stop and go driving. Like others have stated, just revving up to 2000 rpms and slowly rolling out is how I get past the issue.
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      10-22-2019, 03:30 PM   #17
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Same issue here. My research says that the dual mass flywheel is most likely out of spec. My 335 is at 98,000 miles, and and the clutch still holds strong, so I see no need to change it.

If the chatter gets to the point where the car is undrivable, then I'll look at changing the whole assembly. For now, I'm focusing on suspension noise and catching up on maintenance.
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