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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 10-05-2014, 01:36 PM   #1
dd690
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Join Date: May 2013
Location: london. UK
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My Ride: 320CI
Slight clutch slip on 330ci SMG, only when not in sport mode

Before i start, please, i have read all the horror stories and i would love to not be abused for buying an ssg/smg or whatever anyone wants to call it.

OK, so i just bought this car yesterday. (my 4th e46.. addicted!) 2002 330ci m sport, 84k, full service history, great runner, super clean. love it!

so the thing is when the car is driven, on up-shift, it changes gear and there is a slight slip of the clutch after the gear is engaged. similar to when a new driver, driving a manual box, cant get their foot off the clutch pedal quick enough. like its 'rides' a little.

now in sport mode when driven up through the revs or driven like an old couple on a sunday drive it does NOT slip at all.

just wondering weather this slip is me being a little finicky? and they all do it to keep the car going smoothly during slow driving?

any thoughts appreciated. i'm fairly technically minded with cars so the more info people give the better.

also i'm in the U.K if that makes any difference?

Thanks everyone.

Last edited by dd690; 10-05-2014 at 01:37 PM.
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Old 10-06-2014, 07:52 AM   #2
dd690
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Just an update to anyone that may have read this. I spoke to a bmw specialist and they said this is normal to smooth out the gear changes. Seems like driving in sports mode will prolong the life of my clutch lol.
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Old 05-31-2016, 08:54 AM   #3
jonnyonebomb
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Hi I have the same as yours
UK as well, did you have any more problems with the smg?
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Old 05-31-2016, 12:04 PM   #4
mr ilia
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I know old post, but do SMG/SSG have CDV?
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---- My Beemer history ----
2004 BMW 325i sedan - Schwarz II
1998 BMW 323i coupe - Lazurblau
2004 BMW 325ci - Sapphire Black
1991 BMW 318i sedan - Lazurblau
2001 BMW 330i sedan (Auto) - Japanrot

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Old 05-31-2016, 12:07 PM   #5
jonnyonebomb
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Quote:
Originally Posted by mr ilia View Post
I know old post, but do SMG/SSG have CDV?
I'm not sure what a CDV is?
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Old 06-05-2016, 10:10 AM   #6
domibln
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No the SMG has of course no CDV. Clutch slip symptoms are normally caused by leaking clutch actuator (comparable to clutch slave cylinder). It's the most common issue of Non-M SMGs. I offer overhaul for this part, just search forum in case of interest.
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Old 06-05-2016, 10:20 AM   #7
BaliDawg
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Quote:
Originally Posted by jonnyonebomb View Post
I'm not sure what a CDV is?
Clutch Delay Valve: here's a nice little article on it.
https://www.zeckhausen.com/catalog/index.php?cPath=6562

SSG doesn't need a CDV because clutch release is fully controlled by the actuator.
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Old 06-05-2016, 11:17 AM   #8
jonnyonebomb
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Smg it is pal
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Old 06-05-2016, 11:25 AM   #9
Mflara20
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I was looking for a slave cylinder for my Manual and came across a smg slave cylinder and is expensive!

Sent from my SM-G925P using Tapatalk
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Old 06-05-2016, 12:45 PM   #10
jonnyonebomb
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Over my head
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Old 06-05-2016, 01:09 PM   #11
sprintman
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SSG not SMG
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Old 06-05-2016, 02:55 PM   #12
jonnyonebomb
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In your opinion
Obv drive stick
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Old 06-06-2016, 05:53 AM   #13
sprintman
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Quote:
Originally Posted by jonnyonebomb View Post
In your opinion
Obv drive stick
SSG in 325/330, SMG used in M3 only. SSG by Guiseppe Medico of Magnetti-Marelli Italy, and M3 SMG by Siemens. 80ms shift speed in SMG and 150ms in SSG.

Last edited by sprintman; 06-06-2016 at 06:08 AM.
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Old 06-06-2016, 05:58 AM   #14
jonnyonebomb
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Yh I've heard a few different opinions on that.
140k on the clock and it hasn't skipped a beat up to now.
Sounds like I'm a lucky one
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Old 02-27-2017, 04:30 PM   #15
mu6a4
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Sorry for reviving an old thread, but I have the exact same issue as the OP on my e46 330ci with SMG(SSG) gearbox. The clutch actuator doesn't seem to be leaking and it was rebuilt by the previous owner like 20K km's ago, along with changing the clutch, the flywheel and re-teaching the box. The slip seems to be caused by something like a slow clutch engage. Does it necessarily mean that the fault is in the hydraulic unit aka clutch actuator? I always have the option to convert it to a 5spd true manual but wanted to keep the car as it came out of the factory. If anyone resolved a similar problem, please share some experience, thanks!!!
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Old 02-28-2017, 02:40 PM   #16
domibln
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Slow clutch engage could be caused by a leaking clutch actuator. Do you know how the pre-owner rebuild the actuator? If he used the original slave cylinder repair kit (unfortunetely there are some tutorials in the forums, this solution is not working) it's very likely that he caused bigger damage by this. The seal is not fitting, dissolves and causes the piston to stuck in the cylinder - or move much slower. Not always the actuator is leaking in this case, however it's broken.
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Old 02-28-2017, 02:50 PM   #17
mu6a4
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Quote:
Originally Posted by domibln View Post
Slow clutch engage...
Thanks for the answer domibln! I'm afraid he mentioned that he used exactly this slave cylinder repair kit. I mean, it's not like there is specific repair kit for the SMG hydraulic actuator, right? I suspect what you explained is what actually happened, it would make sense. The question now is - is there a way to repair the actuator or should I start looking for a replacement?

Edit: I am also considering a swap with 5spd manual gearbox which will cost less than the hydraulic unit itself.

Last edited by mu6a4; 02-28-2017 at 03:15 PM.
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Old 02-28-2017, 03:30 PM   #18
domibln
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Quote:
Originally Posted by mu6a4 View Post
Thanks for the answer domibln! I'm afraid he mentioned that he used exactly this slave cylinder repair kit. I mean, it's not like there is specific repair kit for the SMG hydraulic actuator, right? I suspect what you explained is what actually happened, it would make sense. The question now is - is there a way to repair the actuator or should I start looking for a replacement?

Edit: I am also considering a swap with 5spd manual gearbox which will cost less than the hydraulic unit itself.
Well so in this case it's clear, the problem is the slave cylinder repair kit. Don't swap to manual, it would be sad. I offer overhaul / repair for the actuator, just check eBay. I don't want to post a link here, in case you don't find it just message me. Unfortuntely it happens often that people use this repair kit, I already had several cases but the repair is still no problem.
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Old 03-26-2017, 10:10 AM   #19
mu6a4
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Alright, so I have an update that I would like to share here since I bumped this old thread 1 month ago:

It turned out that the clutch slave cylinder was never repaired, not the one which is currently on my car at least. I've checked this with one of the previous owners and it appears that this hydraulic unit was replaced with brand new one.

Anyway, I decided to get the car to one of the official BMW Dealerships here as last resort. So after checking the car for leaks underneath, what they did is that they updated the software on the SMG ECU and also ran the procedure for complete adaptation of the clutch etc. This costed like $40, but the best part is that it resolved the problem. Also some other minor issues like stuttering in traffic jams are now gone.

I am satisfied with the result and the SMG is fast again.

PS: Previously trying to re-teach the clutch with INPA didn't work with me.
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