03-08-2016, 08:03 AM | #1 |
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6MT Clutch Replacement
So with 26,XXX on the clock, my clutch seems to be starting to slip, and I wondered if anyone here has had their clutch replaced by warranty yet? I also wanted to ask if the 335is/550i clutch would bolt up to our gearboxes for a stronger clutch. Does anyone have any insight on any of this?
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03-08-2016, 08:38 AM | #3 |
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I hadn't heard about anyone really having an issue like this. I did find this thread about a clutch replacement: http://www.2addicts.com/forums/showthread.php?t=1204149
BTW, your inbox is full and I cant respond to your message on the intake that i'm interested in. |
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03-08-2016, 08:41 AM | #4 | |
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03-08-2016, 01:01 PM | #5 |
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You are probably slipping the hell out of it and don't rev match. 26k is way too early.
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03-08-2016, 01:03 PM | #6 | |
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03-08-2016, 01:17 PM | #7 | ||
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1. This time around, practice releasing the clutch to the friction point (without any throttle) and then adding throttle to keep RPMs steady when you take off. 2. When shifting, generally, don't spend too much time with the clutch pedal between 0% and 100% depressed. Make your shifts briskly. Don't let RPM fall below where they would be in the next gear. 3. YouTube how to rev-match. Practice by rev matching 4th-3rd at about 35mph. That's like 1800 rpm in 4th to like 2300 in 3rd. You blip the gas pedal to bring the revs up from where they are in 4th to where they will be in 3rd while you're foot presses down on the clutch and then when you release the clutch quickly it should be smooth. Mimic the behavior of a modern automatic transmission, basically. It might sound hard at first, but it's really easy after doing it for a day or 2. 2nd gear will always be hardest to rev match, but always get it as close as you can. Never downshift into first. Oh, and btw, if you can't rev match, then only downshift if your at 2000 rpm or below. A downshift from 3000-5500 rpm (like, let's say 3rd to 2nd gear at 40 mph) without a rev match is really hard on the clutch. Hope this helps, I'm sure if you have any questions I and other forum members can give you some more insights. P.S. Maybe one of our European members can chime in. During a trip to Russia last year, I noticed that although many people "drive stick" such as cab drivers, everyone was really really really bad at it. They were really sloppy. They would rev to like 2500-3000 rpm and then release the clutch to move from a stop and then upshift at like 4000 rpm. Why is this? Why aren't Europeans taught how to properly drive a manual?
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03-08-2016, 02:35 PM | #8 | |
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I wouldn't say they don't know how to drive stick, just that not all cars are built the same way, when you are driving a 1.3 liter non turbo, if you shift at 2k, you aren't going anywhere.
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03-08-2016, 04:13 PM | #9 |
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There is a big gap between 1st and 2nd in M235i so if you don't downshift into 1st you may end up lugging the engine because you will rev below 1000rpm in 2nd. For example if you turn 90-degrees into a hill you must slow down practically to a crawl so there is no alternative but to downshift into 1st. Moreover: I looked up "LuK Clutch System Failures.pdf" (LuK makes the clutch) and one of the reasons for premature clutch failure they list is lugging the engine.
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03-08-2016, 04:37 PM | #10 |
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I appreciate all the help and advice on how to drive standard shift. I'd say a year's worth of practice has allowed me to get quite a bit better. It also probably doesn't help the fact that I'm on Map 7 and made 479 WTQ on a dyno last week. I could imagine that will wear a clutch rather quickly too
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03-08-2016, 05:15 PM | #11 | |
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Current: '20 F82 M4cs SMB / '13 640i M-Sport Carbon Black
Past: F30 330xi Luxury Line / F22 M235i 6MT / E92 335i / E46 330ci / E36 328i 5MT |
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03-08-2016, 05:17 PM | #12 | |
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LUK is referring to starting out in 2nd or 3rd maybe. But if the car is completely in gear, and the clutch is not slipping, you're not wearing on the clutch.
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03-08-2016, 05:21 PM | #13 | ||
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03-08-2016, 06:15 PM | #14 |
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It is possible that the clutch is not well matched to the car. I hope this is not the case because I have the same car! Many years ago I had a Mazda 327 that went through 3 clutches under warranty. After the third replacement I traded that sucker in. I never had clutch failures in any other vehicle before or since. Must have been the bean counters vs the engineers.
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03-08-2016, 07:49 PM | #16 |
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50% more torque than stock will certainly wear out the clutch faster, especially on a quick spooling turbo car like the M235. That would be like saying a clutch for a 1.6 liter Honda should work behind a 6.2 liter GM small block.
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03-08-2016, 08:01 PM | #17 | |
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Current: '20 F82 M4cs SMB / '13 640i M-Sport Carbon Black
Past: F30 330xi Luxury Line / F22 M235i 6MT / E92 335i / E46 330ci / E36 328i 5MT |
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03-08-2016, 08:03 PM | #18 | |
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Current: '20 F82 M4cs SMB / '13 640i M-Sport Carbon Black
Past: F30 330xi Luxury Line / F22 M235i 6MT / E92 335i / E46 330ci / E36 328i 5MT |
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03-08-2016, 08:06 PM | #19 | |
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You couldn't even learn to drive it stock to figure out how a MT works. You, for some reason, needed to immediately work it over and now it's coming back to bite you. You only have ONE job with a 6MT, and that's to not slip the clutch. The LEAST amount of time spend on that clutch pedal, the better. No clutch is going hide poor driving skills, sorry. |
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03-08-2016, 08:14 PM | #20 |
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Correct, but clutches (and their all important pressure plates) are designed for a maximum torque load. The stock clutch is likely not designed to handle 50% more torque than stock while meeting design longevity goals (typically 75-125K miles for a passenger car). It's not surprising to me at all that this clutch wore out in 25K miles with a lot more torque than stock and new manual driver.
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03-08-2016, 08:18 PM | #21 | ||
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03-08-2016, 08:26 PM | #22 | |
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You should've learned on a crappy car with little/no/decent power rather than an M235 you decided to immediately basically go FBO with. It's easier to read and adjust to a slower car than it is to a FBO M235 that you're also trying to focus on how to not die in. It took me 2 months of driving my 330i to figure out how to 100% work a 6MT. I got slipping the clutch out of the way the first two days. Sorry, but it shouldn't take you 26,000+ miles to figure it out. Learn how to drive a slow car fast, then you get to graduate onto driving a fast car slow |
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