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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-23-2015, 11:57 AM   #1
lichtgelb
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CSB and Guibo

I'm going to be changing out my noisy center support bearing and the Guibo while I'm in there this weekend. Does anyone have any advice before I crawl under there?
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Old 01-23-2015, 01:23 PM   #2
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I'd spray some penetrating oil on your exhaust bolts.
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Old 01-23-2015, 02:38 PM   #3
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Don't forget to preload the CSB when you tighten it. You can do the job yourself, but it really helps to have somebody that can assist for a while at least to set/release the ebrake when you're loosening/tightening the driveshaft bolts. Also, this would be a great time to replace old shifter bushings if you have a manual transmission.
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Old 01-23-2015, 03:23 PM   #4
lichtgelb
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Quote:
Originally Posted by Tangent_ View Post
Don't forget to preload the CSB when you tighten it. You can do the job yourself, but it really helps to have somebody that can assist for a while at least to set/release the ebrake when you're loosening/tightening the driveshaft bolts. Also, this would be a great time to replace old shifter bushings if you have a manual transmission.
It's an auto unfortunately. Is preloading the bearing just a matter of pushing it closer to the tranny side of the shaft? I've read up on that but wasn't clear.
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Old 01-26-2015, 09:05 AM   #5
lichtgelb
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I did the guibo and CSB job on Saturday. On on a scale of 1 to 10 I would rate this one about a 4.5 in degree of difficulty. If I had a lift and air tools it would be a solid 2. The hardest part was breaking loose the exhaust nuts from the headers. I had to use a breaker bar and a BFH to break them loose after giving them a good soak with some PB Blaster. The exhaust is surprisingly heavy and fabricated from thick gauge stainless steel. I needed some help putting it back up but otherwise this is a one person job.

I had to rent a 7 ton puller to remove the old bearing off the driveshaft spline. I only needed a puller that big due to the reach from the end of the spline to the bearing. I've seen videos and DIY's where the drive shaft halves were held together with a nut. Mine wasn't like that at all. I have a 323 coupe with auto and the drive shaft is simply two halves with the rear half sliding on the long spine. It was already marked so it was a simple matter to slide it back in the correct position.

One thing I'm concerned about. After seating the new bearing on the shaft I noticed there's some play between the shaft and the bearing itself. I'm not sure this is normal and I'm afraid my noise my come back. If that isn't normal then I suppose a rebuilt drive shaft would be the permanent fix. For now the car drives silent with no vibration so hopefully this won't come back. The old bearing was definitely worn. The guibo was starting to tear on the outer surface and I'm glad to have it replaced. This is a 2000 323 with 144,000 miles and this guibo looked to be original.
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Old 01-26-2015, 11:34 AM   #6
teamdfl
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Check your u-joints while the driveshaft is out. If there is any question about them, just order a reman shaft so you don't have to do the job again in a year.
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Old 01-28-2015, 06:21 PM   #7
Tangent_
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Check your u-joints while the driveshaft is out. If there is any question about them, just order a reman shaft so you don't have to do the job again in a year.
Good advice. The majority of the time the reason the CSB fails in the first place is because a U-joint or CV joint is worn and putting extra stress on it. Unless you're short of funds it's easier to replace the driveshaft entirely with a rebuilt one that comes with a new CSB and just be done with it.
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