undercarriage rattle on 87 Euro 730i 5 speed - solved

[Zieg]

I heard a metal rattle when I was driving home from the Vintage it sounded like a loose part on the exhaust system. When we put the car up on a lift to check it out we noticed that the metal cover that surrounds the flex disc has separated from the flex disc itself. The flex disc seems to be ok no cracks but the metal piece that surrounds the flex disc is loose and rattling around.

Has anyone experienced this before? I don't even know what this part is called.

[shogun]

metal cover around flex disc? http://www.realoem.com/bmw/enUS/show...diagId=26_0247
do you mean the center bearing support?

[Zieg]

metal cover around flex disc? http://www.realoem.com/bmw/enUS/show...diagId=26_0247
do you mean the center bearing support?

Shogun I am not sure what it is called but I have attached a picture for your review.

Tks Zieg

[shogun]

new to me, but 5-speed are rare. What is the VIN, so that we can check more in detail? Maybe we check under E23 too, as yr car has some items from the E23 installed.

[Zieg]

new to me, but 5-speed are rare. What is the VIN, so that we can check more in detail? Maybe we check under E23 too, as yr car has some items from the E23 installed.

The Vin# is WBAGA310201616933 Thanks for the help.

[shogun]

drive shaft only used up to 09/1987
01 DRIVE SHAFT ASSY 5 SPEED(OVERDR.)TRANSM L=1656MM 1 up to 09/1987 26111226214 $775.62 ENDED
01 DRIVE SHAFT ASSY 5 SPEED(OVERDR.)TRANSM L=1656MM 1 up to 09/1987 26111226214 $775.62 ENDED
http://www.realoem.com/bmw/enUS/part...BMW-730i&mg=26
and the center mount looks like this https://www.ecstuning.com/b-genuine-...t/26121226723/

It is to be assumed the new universal joint fits into this metal cage and the metal cage is re-used http://www.realoem.com/bmw/enUS/show...diagId=26_0247

[Zieg]

drive shaft only used up to 09/1987
01 DRIVE SHAFT ASSY 5 SPEED(OVERDR.)TRANSM L=1656MM 1 up to 09/1987 26111226214 $775.62 ENDED
01 DRIVE SHAFT ASSY 5 SPEED(OVERDR.)TRANSM L=1656MM 1 up to 09/1987 26111226214 $775.62 ENDED
http://www.realoem.com/bmw/enUS/part...BMW-730i&mg=26
and the center mount looks like this https://www.ecstuning.com/b-genuine-...t/26121226723/

It is to be assumed the new universal joint fits into this metal cage and the metal cage is re-used http://www.realoem.com/bmw/enUS/show...diagId=26_0247

just to clear is it part # 26121226723 Center mount that I need or a complete driveshaft?

[ECSTuning]

Looking at your pics you just need a new center mount (LINK to part number 26121226723)

Photo of 26121226723 for reference

[e30luv318i]

Hi bob ! That piece is a “vibration dampener” I have not seen the piece on any other car besides early ETA e30’s

images of the part in this page

https://www.bimmerforums.com/forum/s...m-clear)/page2


this piece can totally be removed and discarded it’s a common practice In the E30 world to remove them

[Zieg]

Hi bob ! That piece is a “vibration dampener” I have not seen the piece on any other car besides early ETA e30’s

images of the part in this page

https://www.bimmerforums.com/forum/s...m-clear)/page2


this piece can totally be removed and discarded it’s a common practice In the E30 world to remove them

Firstly thank all of you for your quick response to my question. I have been a member of the myE28.com since it was on Roadfly, same with Big Coupe. I did not think I would find the same type of camaraderie on another board until I got involved with this group.

I went back to my mechanics shop and we decided to remove the part and see if doing this has any effect on the driving of the car. If it does then I will have it replaced.

[shogun]

just to clear is it part # 26121226723 Center mount that I need or a complete driveshaft?

just the center mount and the giubo/flex disk, not the complete direveshaft, the cpl. dribeshaft number I only posted for reference.

[Zieg]

just the center mount and the giubo/flex disk, not the complete direveshaft, the cpl. dribeshaft number I only posted for reference.

Thank you Shogun. I understand.

[Zieg]

Thank you Shogun. I understand.

Just to finish this off. My mechanic removed the piece just as Cory suggested. I took the car for a VERY spirited drive yesterday with a local BMW group and the car ran great. No issues with the piece removed and no rattle. Fantastic. Thank you all for your help.