07-28-2018, 03:52 PM | #155 | |
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07-30-2018, 01:03 PM | #156 |
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Very low probability of that being the culprit. In fact most of the tracks I drive have mostly 3 to 4 shifting. Autocross is done on a local runway and maybe twice a run you had to go from 2nd to 3rd, or bounce off the rev limiter for an eternity...
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08-10-2018, 05:30 AM | #157 |
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stock clutch stop
I bought my car second hand with the after market clutch stop already installed with one rubber washer. I don't have the stock clutch stop. Does anyone know what part number it is and where to order it from? Is it ok to use the aftermarket one without any washers and just the felt pad which is stuck to the end of it?
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08-10-2018, 04:46 PM | #158 |
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This site has several if you search 'clutch stop', here is one: https://www.getbmwparts.com/oem-part...er-35316750569
If I were you I would just leave it in, its not going to hurt anything. I recently installed mine with two washers and it really helped eliminate the extra travel. I'm 99.9% sure its not hurting anything. |
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08-11-2018, 10:56 AM | #159 |
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Well, this subject has gone back and forth with speculations as to whether the aftermarket clutch stop can cause tranny issues. The ultimate conclusion is "YES!!" I bought my car with 20k km. It had a constant, slight grind between second and third. I even opened a thread to see who else had the grind. I told myself that I would live with it; yet, it always bothered me. I read on this thread the possibility that the clutch stop may cause this grinding. Well low and behold, it did and does!! I took it out (it had only one washer installed.) I put it back in with only the felt pad on the end and no washers and everything is so f***ing smooth. Does anyone think that any damage was done while the aftermarket stopper was installed. Don't use this!! Now I need to get the original one.
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08-11-2018, 11:20 AM | #160 | |
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08-14-2018, 01:09 AM | #161 | |
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I've had mine on with 3 washers for about 12K miles and no feel of reported grinding. I'm curious to check, maybe I'll swap back the OEM. |
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08-14-2018, 03:36 AM | #162 | |
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Last edited by David.m; 08-14-2018 at 03:54 AM.. |
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08-16-2018, 06:38 PM | #164 |
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08-17-2018, 12:50 AM | #165 | |
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08-20-2018, 12:23 AM | #166 |
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I swapped in the OEM stop drove normally for the past week. There's definitely dead space toward the end of the pedal travel, but it is hard to tell when the clutch actually catches since our cars have that "creep" feature.
I still think 3 washers is safe, but this thread has me paranoid. I will drive it for another week or so on OEM, but I feel 1 or 2 washers totally safe. |
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08-31-2018, 04:13 PM | #167 |
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I replaced my BMS clutch stop with the factory today - feels less notchy now. And I look forward to see what it's like in the winter - in the single digits (F) when first shifting the cold car it would grind slightly with 1 BMS washer (and it wasn't much of a grind because it would be real slow speed and I didn't force it).
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08-31-2018, 05:34 PM | #168 | |
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With the bms clutch stop (2 washers in place) the dead spot was reduced significantly but there was still a little bit of dead space even applying extra throttle to assist in starting from 1st gear. That little bit of dead space imo is still larger than a third washer placed in there. So from my findings I think the bms clutch stop is fine for up to 3 washers without issues. Stock was unbearable to drive with so much dead space I never bottomed out the clutch completely. I think op's grinding issue may be caused by transmission fluid and synchros. My m2 even on stock clutch stops had a weird lock out going from 1 to 2. It feels exactly the same as in my Evo X and was solved by a transmission fluid swap to "redline cocktail". I might mess around with my transmission fluid sooner or later and report back. |
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09-01-2018, 06:36 PM | #169 |
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The clutch on the M2 is hydraulic isn't it, and even minute amounts of air in the lines can change the biting position. I suspect that what works for some people may be too much for others. Clutch wear may also play into this, I'm not sure about that though.
I think the important thing is to stay on top of it. If you're getting grinding and you know it's not your technique, then try removing a washer, or going back to stock. I think it's unfair for anyone on this forum to say, for example, 'two washers is fine, three is too much', because for another car, it simply might not be.
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09-01-2018, 08:01 PM | #170 | ||
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09-03-2018, 09:59 PM | #171 | |
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09-09-2018, 09:15 AM | #172 |
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This thread has me concerned. Can anyone verify using the "window" technique mentioned earlier? Using two washers now, but might go back to OEM if we can't get some proof this is ok to use.
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09-09-2018, 10:32 AM | #173 |
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Someone mentioned this in this thread (not going back to look), but I don't think a "window" exists for the F87 (though I don't know for sure) or for all/most vehicles. But someone else can correct me if I am wrong.
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09-09-2018, 01:25 PM | #174 | ||
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That being said you can try the test I have done before which I have quoted above. Imo this is probably one of the most comprehensive tests you can do to ensure your clutch is fully disengaged. |
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