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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 11-16-2010, 10:37 AM   #41
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The more I read into this, the more it sounds like either a bad slave cylinder or a bad throwout bearing.

Looks like I will have to pay some Korean hack mechanic to fix my car if a new slave cylinder won't fix it. Should be interesting...they do not have manual BMWs here in Korea. So I highly doubt anyone has a lot og experience with BMW clutches.
Taking the bellhousing off is the hardest part and that shouldn't be too different with a manual. Once you're inside things are pretty simple unless the pressure plate is coming off.

The noise made me think of the throwout bearing, but I wonder how a slave cylinder issue and a throwout bearing issue would be related. Two [perhaps absurd] things come to mind:
  1. The throwout bearing race seizes and the race bulges from the pileup(?) and that bucks the fork backward a little which overwhelms the slave cylinder and its seal blows. The rattle is the messed up bearing race.
  2. The slave cylinder doesn't retract all the way and spring tines of the pressure plate, which might be a little uneven, keep smacking the throwout bearing's pivoting face which you hear as a rattle.
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Old 11-16-2010, 05:27 PM   #42
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Right now, I just want to get the car to the point where I can drive it to the shipping point so I can get it back to the US. Then fix the problem in the US.

I guess I need to come to grips that there is a good chance that I'll need to pull the bellhousing here. Need to find some external torx sockets.
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Old 11-19-2010, 01:56 AM   #43
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Got the new slave cylinder. I popped it in the hole and bled it a little. I started the car while on jack stands, turned off the DSC and the rear wheels were turning. Obviously a little tough to shift since I didn't REALLY bleed the clutch that well.

I will remove the slave cylinder and bleed it properly out of the car this weekend. So I hope it was just a slave cylinder/hydraulic problem.
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Old 11-19-2010, 08:35 AM   #44
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Cool good luck!
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Old 11-19-2010, 07:41 PM   #45
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Hope it works out for you!
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Old 11-21-2010, 08:03 PM   #46
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Bump! Any updates on this?
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Old 11-21-2010, 08:41 PM   #47
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Bled the cylinder while it was out of the car...all seems to be well. I hope to get the car off of the jack stands tonight and test drive.
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Old 11-22-2010, 11:20 PM   #48
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Still have a rattle and an engagement issue. Going to order a throwout bearing, fork, spring, and pin and then pull the tranny out.

Hoping its just the bearing and not the pressure plate or clutch. Then I might have to ask Santa for a UUC clutch kit.
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Old 11-23-2010, 05:59 AM   #49
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mannnn
well at least there'll be a lift involved- it should go pretty smooth
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Old 11-23-2010, 06:05 PM   #50
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Hopefully...it seems like it would be a total whor3 to do it on jack stands. Crossing fingers my clutch and pressureplate aren't jacked.
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Old 11-30-2010, 05:54 PM   #51
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Probably the TO bearing. Goodluck. Have fun having the tranny on your chest and knees
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Old 11-30-2010, 06:32 PM   #52
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Probably the TO bearing. Goodluck. Have fun having the tranny on your chest and knees
Oh noes...I will be doing military presses with my 6 speed since I will be putting my car on a llift to do this.

I've got parts (the hold up in all of this)...just need to some free time! Hopefully I will finish this on Saturday.
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Old 12-02-2010, 04:40 PM   #53
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Can a bad throwout bearing potentially cause my clutch to slip?

May the force be with me....I'll dive into this in about 9 hours!
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Old 12-02-2010, 10:16 PM   #54
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Can a bad throwout bearing potentially cause my clutch to slip?

May the force be with me....I'll dive into this in about 9 hours!
Not really - even if the throwout bearing was destroyed or missing the clutch wouldn't slip. It's just the thing that gets pushed into the pressure plate's lever tines to take pressure off the clutch disk. Clutch slippage would pretty much have to do with the clutch disk and/or the pressure plate.

Good luck in there!
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Old 12-03-2010, 09:30 PM   #55
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Well...got the transmission off. Really not THAT bad on a lift. Took 2.5 hours for removal. 1 broken bolt, shouldn't be too bad to remove. Actually pretty straight forward. The hardest bolt to get out was one that I could see! If you are on a lift, you CAN see all 9 bolts if you tilt the engine back.

What happened? I pulled off the bell housing and the inside was covered with oil. The throwout bearing, arm, and pin seemed to be fine. The pressure plate looked good, all of the fingers were there. I took off the pressure plate and then WTF! One of the flywheel bolts was completely backed out. 6 were loose and 1 was tight. The backed out bolt was lodged between the pressure plate and flywheel which scored the inner metal part of the clutch. Not to mention that the flywheel is covered in oil.

So I need to order new flywheel bolts which will be installed with loctite. Basically I am dead in the water until some new flywheel bolts arrive...maybe 1 week. For the record, I did not do the clutch install.

Pics to follow.
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Old 12-03-2010, 09:40 PM   #56
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^The source of the oil was a shot RMS right?
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Old 12-04-2010, 06:25 AM   #57
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That's what I suspect. I am willing to bet the loose flywheel bolts is the source of the issue.
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Old 12-04-2010, 07:11 AM   #58
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Spent all afternoon drilling out the bolt with dull drill bits...needless to say I didn't get very far. Korea suxs!
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Old 12-04-2010, 07:48 AM   #59
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One of the flywheel bolts was completely backed out. 6 were loose and 1 was tight. The backed out bolt was lodged between the pressure plate and flywheel which scored the inner metal part of the clutch. Not to mention that the flywheel is covered in oil.

So I need to order new flywheel bolts which will be installed with loctite. Basically I am dead in the water until some new flywheel bolts arrive...maybe 1 week. For the record, I did not do the clutch install.

Pics to follow.
Holy crap. Harmonics eh? I think the UUC flywheel does need different bolts : P
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Old 12-04-2010, 10:18 AM   #60
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The 5 speed UUC flywheel uses random bolts. Make sure you ask Rob for the right part number.

Glad you got it figured out, but this is exactly why I don't like taking my car to shops. At least if there's a goof-up it's my own fault for not doing it right... and I didn't pay someone else to do a poor job. Good luck!

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For the record, I did not do the clutch install.
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