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  #11  
Old 05-16-2024, 09:12 AM
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Not sure about the V8. But I know with the M54 and with my 340ix f30, you can't get to all 4 diff bolts without raising the engine and/or lowering the subframe. And even if you could get to the bolt there's not really any room to move it. On this car I was able to get to two out of four but the other two were obstructed by the engine mount area etc. I don't know for certain though, perhaps it can actually be done in a certain way, hopefully somebody else will chime in.

There's also a little protective ring they added to use when installing the diff. I wish I had ordered this when I did it but I didn't know about the part until late and sent it in anyway without it.

https://www.realoem.com/bmw/enUS/sho...14#11137506632

I think it's number 9 in the diagram which is greyed out. When I called my local dealer about it, he said it showed is not applying to the VIN. I don't think that's right but i didn't bother holding up the whole show for it. Not really sure what's going on in the parts catalog with it. Factory manual says it is intended to protect that o-ring from dirt as you slide it in.

I just got everything super clean with the microfiber brake cleaner and compressed air. It was a little awkward to bench press up and get seated in there perfectly without messing that ring up but it was more doable than I initially expected. I would say it weighs about 50 lb maybe. Also make sure you fully mark both ends of the front prop shaft->diff flange so you get everything installed in the same orientation.
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  #12  
Old 05-16-2024, 09:15 AM
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N62 Alternator Bracket Gasket

https://www.fcpeuro.com/products/bmw...x5-11137506632

It looks like just a guide to help install the seal and you can do the job without it. Do you have access to newtis? You can check the install manual.
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  #13  
Old 05-16-2024, 10:27 AM
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Quote:
Originally Posted by Factory6speed View Post
Not sure about the V8. But I know with the M54 and with my 340ix f30, you can't get to all 4 diff bolts without raising the engine and/or lowering the subframe. And even if you could get to the bolt there's not really any room to move it. On this car I was able to get to two out of four but the other two were obstructed by the engine mount area etc. I don't know for certain though, perhaps it can actually be done in a certain way, hopefully somebody else will chime in.

There's also a little protective ring they added to use when installing the diff. I wish I had ordered this when I did it but I didn't know about the part until late and sent it in anyway without it.

https://www.realoem.com/bmw/enUS/sho...14#11137506632

I think it's number 9 in the diagram which is greyed out. When I called my local dealer about it, he said it showed is not applying to the VIN. I don't think that's right but i didn't bother holding up the whole show for it. Not really sure what's going on in the parts catalog with it. Factory manual says it is intended to protect that o-ring from dirt as you slide it in.

I just got everything super clean with the microfiber brake cleaner and compressed air. It was a little awkward to bench press up and get seated in there perfectly without messing that ring up but it was more doable than I initially expected. I would say it weighs about 50 lb maybe. Also make sure you fully mark both ends of the front prop shaft->diff flange so you get everything installed in the same orientation.
I agree. That little metal protective ring is needed to protect the new seal when muscling the diff into position. You donít want to cut the o-ring and find out after the car is back together that itís leaking.

The diff is quite heavy and itís a tough job to get it into place without some inadvertent contact and banging around. Iíd recommend a helper to, at a minimum, slide the bolts in as you muscle the diff around and into place. I did it on my back with the car on jack stands. Even following the Bentley procedures (impossible otherwise, unfortunately I tried to short cut the process and wasted a lot of time and bloody knuckles), the 50 lb diff has to be threaded into place via room created by dropping the subframe a bit and lifting the motor a few inches.

If I do it again Iíd have the car on a lift, the diff on a jack or other support stand and a helper to help maneuver it and slide the bolts home.

I recall that I ordered the seal/o-ring and protective ring from another x-drive car. I think FCP recommended it when I put the part numbers in? I may have the pn of the one I used in some old notes. Let me know if you need me to dig around for it.
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  #14  
Old 05-16-2024, 10:41 AM
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Thanks for the above everyone - and noted on orientation of driveshafts, circlip, and the need for the installation ring for the diff seals.

Just to clarify - will there be enough room to install the gasket between the diff and oil pan once the diff is loose (videos seem to shoe sliding the diff down to access the alternator bracket. Not full removal out fromnunder the car….- does it have to be (and can it?) be removed out from under the car/is there enough room to do this - or can it be wiggled around enough to reach in between it and the oil pan to install the seal?
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  #15  
Old 05-16-2024, 10:59 AM
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Quote:
Originally Posted by svvg View Post
Thanks for the above everyone - and noted on orientation of driveshafts, circlip, and the need for the installation ring for the diff seals.

Just to clarify - will there be enough room to install the gasket between the diff and oil pan once the diff is loose (videos seem to shoe sliding the diff down to access the alternator bracket. Not full removal out fromnunder the carÖ.- does it have to be (and can it?) be removed out from under the car/is there enough room to do this - or can it be wiggled around enough to reach in between it and the oil pan to install the seal?
Canít help you there. I did the job on an m62, and was pulling the motor. I donít recall how much lateral space was available to maneuver the diff and if it was enough to re-seal it without dropping it out entirely. You wouldnít need much, but it was very, very tight.
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