Z3 Subframe: Snapped threaded rod!

[sideslip]

Diff is ready to come out so I was working on dropping the subframe to install IE bushings. Soaked the collar nut in PBBlaster a few times and when I while trying to remove it, the threaded rod/stud snapped (#2 in the pic below)! :cry: Never had a problem on the other two Coupe's I've done.

Anyone replaced the threaded rod that connects the subframe to the chassis before? I feel sick.

http://www.newtonslanding.net/Misc/TMP/18.png

[KBH22102]

Can't see your pictures, but if you're referring to the mounting stud that goes through the center of the bushing, that is a replaceable part #33321090951. I think it threads in directly to the body. You need a really big socket - something like 27mm - to get it on.

http://i227.photobucket.com/albums/dd186/kelvinhao/IMG_4632-1.jpg

[sideslip]

Can't see your pictures, but if you're referring to the mounting stud that goes through the center of the bushing, that is a replaceable part #33321090951. I think it threads in directly to the body

That's the one. I just got the subframe down so I could get a closer look. I'm going to PBBlast it for a day or two before attempting to remove it. If it doesn't move easily, maybe I'll try some heat.

[Randy Forbes]

With the subframe out of the way (and the right tools) you shouldn't have any trouble replacing the stud.

I did bushings on one (1) Z3 last year that the stud came out of the body instead of the nut coming off, but I've never snapped one off...

http://www.rfdm.com/Randy/BMW/pics/projects/Subframe%20Bushing%20Project/27mm.JPG

[sideslip]

Oh, I like that socket Randy! Did you grind the flats or did it come that way.

[Randy Forbes]

Oh, I like that socket Randy! Did you grind the flats or did it come that way.I cut them using a rotary table (to index 6 X 60 degrees) on a milling machine.

I use a 1-1/8" DEEP socket to turn it.

[Randy Forbes]

Here's one...

http://www.rfdm.com/albums/album68/asr_105.jpg

[sideslip]

I cut them using a rotary table (to index 6 X 60 degrees) on a milling machine.

I use a 1-1/8" DEEP socket to turn it.

Cool!

[sideslip]

I do not have the "Forbes skillz" required to modify a socket to work. I did manage to find a 27mm deep impact socket but had to cut the stud for it to fit. Removal was no problem with the impact gun.

http://www.newtonslanding.net/Misc/P5180035.jpg

[Randy Forbes]

You're halfway there... ;)