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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 10-25-2010, 03:25 PM   #1
Minnetonka
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Clutch Replacement HELP!!

So after having the parts in for a couple weeks I finally got around to installing my new clutch from UUC this last saturday. I get to the point of removing the four main bolts on the bell housing and they were fighting me like crazy. It almost felt like someone had jammed bolts in there with the wrong thread size. I have done a clutch job on an E34 before and I didnt have this kind of this problem at all. I had to give up and put the car back to together since i was running out of time and its my daily. What am i missing?!?!?
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Old 10-25-2010, 04:02 PM   #2
McSpeed
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Originally Posted by Minnetonka View Post
So after having the parts in for a couple weeks I finally got around to installing my new clutch from UUC this last saturday. I get to the point of removing the four main bolts on the bell housing and they were fighting me like crazy. It almost felt like someone had jammed bolts in there with the wrong thread size. I have done a clutch job on an E34 before and I didnt have this kind of this problem at all. I had to give up and put the car back to together since i was running out of time and its my daily. What am i missing?!?!?
I know what you mean - the bolts felt way tighter than their torque spec suggests. I just made sure I had the right torx socket and added a pipe for leverage IIRC. It was pretty obnoxious.

Also - in my situation the starter's guide pin in the top driver's side area of the bellhousing had corroded slightly and prevented me from pulling off the bellhousing for awhile. I'd recommend undoing the two starter bolts and working the starter off toward the front of the car (twist back and forth over and over ) before trying to take the bellhousing off.
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Old 10-25-2010, 11:03 PM   #3
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I just made sure I had the right torx socket and added a pipe for leverage IIRC. It was pretty obnoxious.
Your talking for every turn of the bolt, not just breaking it loose? For me its every turn.
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Old 10-25-2010, 11:13 PM   #4
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Also, do you have to take the starter out? Didnt have to do it on the M50B20.
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Old 10-26-2010, 06:01 AM   #5
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Your talking for every turn of the bolt, not just breaking it loose? For me its every turn.
no mine was only ridiculous when breaking it initially . they didn't come out finger-turn easy after the break but it was the break that was tough

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Also, do you have to take the starter out? Didnt have to do it on the M50B20.
You don't have to take the starter out of the car though; once it's unbolted and off the guide pin the starter can just hang out up there until you get the bellhousing back on.
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Horsepower vs. Torque

Last edited by McSpeed; 10-26-2010 at 06:05 AM.
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Old 10-26-2010, 07:03 AM   #6
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The two top bolts go right into the block and are blond holes (you can't get to the backside of them). The bottom two have an open threaded hole. I suggest spraying some penetrating oil on the bottom ones, turn then out a few threads, spray some more on, thread them back in. Keep repeating. If you do get everything off, I do suggest applying anti seize to all of the bolts before you put it back together.
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Old 10-27-2010, 06:54 AM   #7
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The two top bolts go right into the block and are blond holes (you can't get to the backside of them). The bottom two have an open threaded hole. I suggest spraying some penetrating oil on the bottom ones, turn then out a few threads, spray some more on, thread them back in. Keep repeating. If you do get everything off, I do suggest applying anti seize to all of the bolts before you put it back together.
That must be it^

Any idea how to properly torque these bolts when putting them back on since universal joints tend to skew torque readings?:


from http://www.algeo.com/~joe/KIAT/kiat_3.htm

Edit: or now that I understand the graph more...maybe the skew is too small to matter - I'm guessing that for the transmission bolts the angle wouldn't exceed 40 degrees.
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Turbo Driveability Video

Horsepower vs. Torque

Last edited by McSpeed; 10-27-2010 at 07:17 AM.
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Old 10-27-2010, 03:14 PM   #8
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As for torque, I go by PFT. That stands for Pretty F_____ Tight.
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Old 10-27-2010, 09:12 PM   #9
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as for torque, i go by pft. That stands for pretty f_____ tight.


+1
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