M-System II/Throwing Star/Turbine Owners...Got a question?

[MTechnik540i]

What kind of hardware did you use, if you replaced your Throwing Star/Turbine's hardware?

Wanting to replace, i've heard they use a unusual kind of bolt...that needs a certain key.

Any help is appreciated, thanks.

[David Chen]

Turbine covers use the M6x30 bolt and Throwing star covers use the M6x20 bolt. Both require a triple-square hex key for installation/removal. These bolts are made of very soft alloy and strip easily. Apply liberal amounts of PB Blaster catalyst or WD40 and allow it to soak in before using a hand impact wrench to remove.

Cheers,

David

What kind of hardware did you use, if you replaced your Throwing Star/Turbine's hardware?

Wanting to replace, i've heard they use a unusual kind of bolt...that needs a certain key.

Any help is appreciated, thanks.

[Qsilver7]

if you need to order parts...you can get them from your local BMW dealer. I went to the online parts database and here are the part diagrams and part number indexes for each wheel:

Turbine (M System I) Style 20: http://www.realoem.com/bmw/showparts...22&hg=36&fg=15

Throwing Stars (M System II) Style 21: http://www.realoem.com/bmw/showparts...55&hg=36&fg=15

[MTechnik540i]

if you need to order parts...you can get them from your local BMW dealer. I went to the online parts database and here are the part diagrams and part number indexes for each wheel:

Turbine (M System I) Style 20: http://www.realoem.com/bmw/showparts...22&hg=36&fg=15

Throwing Stars (M System II) Style 21: http://www.realoem.com/bmw/showparts...55&hg=36&fg=15

Thanks fellows!

[JohnC]

no bmw dealer could tell me where i can get the tool to remove the bolt, i just found an allen wrench that would work and im just going to replace all the bolts next time i put the covers back on.

[Qsilver7]

Hmmm, if the diameter of the bolt is small...I wonder if the sunroof tool will fit it. It's hard to believe that BMW would have something on the wheel that didn't have a tool in the toolkit to remove it.

Also, the Touring has a small socket and the larger spark plug tool (see the two #7s in the diagram for the Tourings tool kit): Diagram 7 part # index of e34 Touring's toolkit

I wonder if the small socket (in diagram above & pic below) fits...or like I mentioned earlier...the sunroof tool (since it has the shape of an allen wrench)...or even one of the smaller wrenches (spanners) in the trunk's tool kit.

Just curious?

[David Chen]

In a pinch, a 5mm hex key will fit -- just make sure it's hammered in good and tight first.

The proper 6mm triple-square tool is available from:

NAPA -- dodecagon head 12 pt. w. tapered shaft

Snap-On -- 6mm tool number FTSM6E

Lisle -- in a 4-pack, it's the smallest one

And the tightening torque is only 9NM (~6.5 lb-ft)

Cheers,

David