little screws for the butterflies in the TB

[irish44j]

Disassembled the TB completely to do a refresh. Looking at the little screws on the butterflies (that hold them to the shafts), they almost look to be mildly mushroomed at the base of the thread (essentially, a lock-screw). When removing, looks as if the last thread on the screw pretty much just shaved itself out (these things are TIGHT).

I don't see those screws shown anywhere on RealOEM or elsewhere as a standalone part. Any advice on putting them back in/replacing them? At this point it looks like I'll just chamfer the edge a bit and use some red loctite, but would obviously like to "do it like the factory" if possible.

[wazzu70]

I think uour best bet is to reuse the screws and use loctite. They aren't intended to be disassembled from the factory point of view.

A lot of times its a really fine thread pitch too so no normal fasteners work as replacement!

[DesktopDave]

They're staked to prevent them falling down the intake. I'd probably reuse mine with some Loctite red, since they don't get very warm.

I'd suspect you could order them from a supplier like Grainger, but I'm not sure of size. I'd bet they're a common metric size.

[wazzu70]

Dave, the BMW ones might be a common size but I know VW and Porsche are not a common size. I assume BMW would be similar.

Your best bet is to reuse the fastenets!

[bigskyis]

I could be dead wrong on this account but those screws are installed and staked as they are not a serviced item. Your best bet and (safest) path of least resistance is another complete throttle body. And leave the screws alone on the next one.