Searching for anyone who has installed the 650i differential cover

[Yeineken]

Originally Posted by gap

looks good, be sure to get the magnetic fill plug.

Any specific vendor or type?

[Everfly]

Bump this up and would like to know anyone running aftermarket exhaust with more clearance and don't need to remove 3 fins

[drinkcoke3]

do i need a gasket for the new diff cover?

also, did anyone take theirs to a shop for install? rough range on pricing I can expect on this?

[Pig Farmer]

Originally Posted by drinkcoke3

do i need a gasket for the new diff cover?

also, did anyone take theirs to a shop for install? rough range on pricing I can expect on this?

No gasket, just use Loctite 5970 gasket sealant. A shop with a lift would probably charge 2-3 hours to drop the diff, replace the cover and refill and reinstall the diff.

[Bimmer-Bob]

Just wanted to update this thread with some information that might be of interest to some of you. It turns out there's a fined cover that also fits the 128i diff (TYP 188L). It's from the E60 5er, but O believe also comes standard on some 6er and X class models. I believe the p/n is 33117528319.

Fitment is more or less direct, with minor modifications required. My diff builder (Jim Blanton at Performance Gearing) said he had to use a 15mm spacer and a longer bolt. No trimming of fins was required on my 128i with the smaller 188L diff - although I am running a MagnaFlow cat-back, so the stock exhaust might have clearance issues (although I kind of doubt it).

[Dackelone]

Originally Posted by Bimmer-Bob

Just wanted to update this thread with some information that might be of interest to some of you...

That finned diff cover looks pretty sweet!

[Bimmer-Bob]

Originally Posted by Bimmer-Bob

Just wanted to update this thread with some information that might be of interest to some of you. It turns out there's a fined cover that also fits the 128i diff (TYP 188L). It's from the E60 5er, but O believe also comes standard on some 6er and X class models. I believe the p/n is 33117528319.

Fitment is more or less direct, with minor modifications required. My diff builder (Jim Blanton at Performance Gearing) said he had to use a 15mm spacer and a longer bolt. No trimming of fins was required on my 128i with the smaller 188L diff - although I am running a MagnaFlow cat-back, so the stock exhaust might have clearance issues (although I kind of doubt it).

Looking at the numbers embossed on my diff cover, I believe it is actually p/n 33117516280, which is for the TYP 188K diff, not the TYP 188L diff. This could explain why fitment requires a 15mm spacer. This diff cover was originally fitted on some E60/E65/E66 5 and 7 Series cars.

[BeGood69]

Does anyone have the link for the hp autowerk kit? Or other supplier? With the spacer, bolt and cover modified?

[Dackelone]

Originally Posted by BeGood69

Does anyone have the link for the hp autowerk kit? Or other supplier? With the spacer, bolt and cover modified?

Just call Harold at HP Auto. He can get you one. Or go to a BMW dealer and order the 7er diff cover. Look back in this thread for the part number.

Dackel

[BeGood69]

The kit from hp seems to b modified and all, bolt/spacer was in. I prefer all done already and just put it on. Vs add more to my work load !
Do we have a number for Harold at hp auto?

[Dackelone]

Originally Posted by BeGood69

The kit from hp seems to b modified and all, bolt/spacer was in. I prefer all done already and just put it on. Vs add more to my work load !
Do we have a number for Harold at hp auto?

http://www.hpashop.com/BMW_c108.htm



805-892-2000

HP Auto
523 Garden St
Santa Barbara, CA 93101

[BB_cuda2]

Originally Posted by Pig Farmer

I realize this thread is kind of a work in process and needs to be cleaned up with final measurements once the install is complete. The spacer I made is 1-1/4" OD, 9/16" ID and 15.5mm long. I cut the spacer from a piece of aluminum round stock (1-1/4" in diameter). If I were to do it again, I would use 1-3/8" round stock.



An alternative method would be to get a 5/8" thick piece of aluminum plate, and use a 1-1/2" hole saw to cut out a core. I tried this with a 1/8" think piece of aluminum plate and the core was just under 1-3/8" in diameter. Then drill out the center with a 9/16" bit. This would result in a spacer 5/8" or 15.875mm long. The difference between 15.5mm and 15.875mm is about the same as 4 sheets of paper. This method requires a pretty sharp hole saw, lots oil/WD-40, and a pretty beefy drill press.

I'm BB_cuda over on e90post/M57 diesel section. For whatever reason, I couldn't link that account over here .... So, I appear as a rookie to you all, but I'm 2000+ posts strong over in my own normal place.

Bringing this thread back from the grave. I'm determining easiest route to fabricate the spacer. Either buy the 1.25" OD threaded standoff or buy 5/8" thick aluminum plate and use hole saw 1-1/2". Its been ~ 2years since you guys figured this out. It would seem more straight forward to buy the round stock and drill the ID and cut to length. I even have reamers 15/32", 1/2", 17/32", and 9/16" that I bought for a waste gate porting job. Much better in terms of not grabbing and twisting. I have access to a neighbor's decent drill press too.

I won't need to trim the fins on my 650i cover as I have a custom exhaust that has a little more clearance.

I'm trying to go one further than you all by getting a drain hole installed. Either will have to cut a fin out of way down below fill port or (what I really want to do) have a hole tapped into the bottom of the final drive casing at same M22x1.5" thread that fill port plug is. That way I can use 2 same plugs and the 14 mm allen socket tip to access them. This last thing isn't a mandatory. I already purchased an aluminum weld bung for the cover drain option with the M22x1.5 femaile threading. Talking to machine shop about tapping the case option. They don't sound too thrilled though.

I spoke with another veteran machinist named Techevo that did his own machining to install a wavetrac. He has an absolutely fabulous thread showing his professional level work. I'll go find that thread and paste it in here for your amusement. Techevo feels I should disassemble the ring gear/LSD from the casing prior to having the case tapped for M22. Talking with Harold about this. If I go this route, I will have the axle stubs installed without the seals installed so that I don't destroy the seals and have to purchase new ones. He would just put the seals in the shipping container for post tapping use. We will see.

I'm going the wavetrac option with Harold at HP Autosport doing the conversion for me.

[BB_cuda2]

I came back and realized i never provided this kick butt thread he put together. Enjoy.
http://www.e90post.com/forums/showth...hlight=techevo

Also, per my above post, I did have a custom spacer machined out of aluminum 1.25" OD x 0.562" ID X 0.625" thick. It was costly at $75 but it was also Christmas. If anyone needs a spacer, I know i guy that will sell them for $26 plus shipping. He and i hang out over on e90post/m57 diesel section. His user name is whitbread. He is a wavetrac dealer is anyone is interested in converting over to LSD.