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Suspension & Braking Forum by BimmerWorld
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Old 03-10-2013, 02:43 PM   #1
Fred22
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Can E-46 driveshaft U-Joints be changed?

all the BMWs i've owned in the past had so-called non-replaceable driveshaft U-joints. is the E-46 the same? there used to be a cottage industry of artisans who could replace the U-joints and balance an old shaft... otherwise the drive shafts were $1000 plus to replace with new.

what says the Esteemed Forum?
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Old 03-10-2013, 02:52 PM   #2
pawelgawel
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Non replacable, Unless you cut and weld and ballance..

Not worth the effort unless you do it yourself. Better off buying used.

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Old 03-10-2013, 03:34 PM   #3
dmax
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You don't need that u-joint...

If someone told you did they're probably guessing. If you have a vibration issue, it's giubo (spelled guibo here...aka as the Universal Joint...the flex disk), or it's center support bearing.

Trust me. You could be the second one here that does.

You want to mention your symptoms while you're here?
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Old 03-10-2013, 09:35 PM   #4
BlaccDiamonds
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Sorry to OP for stealing the tread....but dmax...I hear a "clack clack clack" after I shut my car off.....thinking at first maybe loose metal shields or something....but the more I hear it, the more it sounds like a joint or something.
Anything sounds familiar?
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Old 03-10-2013, 10:06 PM   #5
dmax
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blac...could it be the clicking of a cooling exhaust? That sounds like a fun guessing game worthy of a thread. Use a hose 5' long, 1" diameter or so as a stethoscope and find the sound. I use flexible electrical conduit from HD.
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Old 03-11-2013, 10:28 AM   #6
BlaccDiamonds
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DMax...no, I know what a cooling clicking exhaust sounds like...this is more like the sound of the engine "dieseling" as it shuts down...but its not the engine because its coming from underneath the car, or at least the drivers side cuz I can hear it.

The car drives fine by the way...no issues. When I get a chance and the weather is a bit warmer I'm gonna get down there and take a look.
Probably have it on a ramp and have someone shut the car off while I look and listen.
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Old 03-11-2013, 03:51 PM   #7
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Blacc...make your own thread about it...and listen to pulleys.


OP...fyi our u-joint is unserviceable. Only reason for it to go bad is if it got a bad kink in it. A driveshaft can be balanced, but without any apparent damage, I doubt it needs to be--the odds are against it anyway. You might need giubo and csb...which you'd also get if you got a new driveshaft.

Only way otherwise driveshaft might be off balance is if csb was done before and shafts weren't marked before they were separated.
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Old 03-19-2013, 05:29 PM   #8
eweis
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I was just quoted $350 for a re-man'd driveshaft from Portland so, they're not all that much.
See...you could get down there and replace the flex disc and the center support bearing but, if your CSB is going bad, it may be or perhaps it's probable that your U-joint is bad which is, in turn, causing your CSB to fail. So, if you just replace the flex disc and CSB, you may still have a U-joint problem which will again kill your CSB.

I'm getting a low speed (15-25 mph) groaning, lurching noise as the wheels (and driveshaft) turns. At this point, I'm assuming it's the CSB and/or U-joint that is going out. So, based on my logic above, I'm thinking about simply replacing the entire driveshaft.
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