Prop Shaft Bearing

Rek said:
I remain confident but cautious. I take your point on pre-loading and that was done. The mount is also new. I have 256bhp as opposed to 170bhp standard so 50% additional power means something is necessary. Either engine mounts or propshaft bearing holder, and the propshaft bearing holder was easier.
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FWIW, the '87 M6 advertised power similar to yours. It employed the same center driveshaft support/bearing 26111206502. That does not mean it couldn't stand improvement. o_O

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https://www.realoem.com/bmw/enUS/showparts?id=5514-USA-07-1987-E24-BMW-M6&diagId=26_0058
https://www.realoem.com/bmw/enUS/pa...W-M6&mg=26&sg=10&diagId=26_0058&q=26111206502
 
Well that didn't work very well. I had the new bearing and housing fitted and at low speeds it was fine. As soon as there was acceleration and speed, there was a horrible reverberation. I have yet to investigate but despite being checked, the prop must be out of alignment. My question is how can this be and how can I check and adjust the alignment. Any ideas welcome

I have yet to look under the car to see if the bearing is still in one piece. It could be that the polyeurathane came loose from the bearing housing and I have a donut of poly rattling around.
 
Rek said:
The transmission mounts are new from Coupe King. How do I check and adjust the driveshaft angles?
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Loosen the tranny flange/driveshaft bolts so there is about 1/8" gap, then rotate the driveshaft, if the distance closes or opens between the two surfaces you need to adjust the up and down or side to side position (or both) of the center bearing mount so that no wobble is present. You may need to add washers or enlarge the bearing mount slots to allow for more adjustments. A little goes a long way. Then tighten the tranny flange back up to the D/S.
 
Rek said:
I need to look at the phasing too. It might be that the shaft is out 180 degrees. Is there an easy way to know this?
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At least my driveshaft has one marking on each half (a dot, if I remember correctly), these marks/dots should line up against each other.
 
Stevehose said:
Loosen the tranny flange/driveshaft bolts so there is about 1/8" gap, then rotate the driveshaft, if the distance closes or opens between the two surfaces you need to adjust the up and down or side to side position (or both) of the center bearing mount so that no wobble is present. You may need to add washers or enlarge the bearing mount slots to allow for more adjustments. A little goes a long way. Then tighten the tranny flange back up to the D/S.
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That's great advice. Thank you.
 
My "better centre support bearing" has yet to be finally tested. As yet no, but it may need more accurate adjustment as per @Stevehose suggestions because the tolerances are less. I looked at the prop shaft and the positions were marked so that indicates that it was put together how it came apart.
 
Rek said:
My "better centre support bearing" has yet to be finally tested. As yet no, but it may need more accurate adjustment as per @Stevehose suggestions because the tolerances are less. I looked at the prop shaft and the positions were marked so that indicates that it was put together how it came apart.
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Hi there
I was wondering if from members experience, is a manufacturer of a centre support bearing prefered over another. Like is SKF prefered over Febi, for example.

Cheers
 

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