924Board.org

[Patrick]

Hi Guys!
I just now realized that the thinner shaft portion at the end of my strut inserts (the one that goes in the strut mount bearing) is fully threaded, as opposed to my old struts, where the portion of the end that goes in the strut mount bearing is smooth, and the rest of it threaded (like most struts i assume) for the locknut.

Also, that end of my strut insert shaft is too small (about 11.9mm diameter) for the hole of the inner race of the strut mount bearing (about 14mm diameter), thus needing a bushing to make that end size up properly in the bearing inner race hole.

I`ve asked before what kind of fit there needed to be between that strut end shaft and the inside diameter of the "sizing bushing", and was told that it needed to be a snug fit, but should go on without any real pressure, but i assume that was for a smooth part of the (thinner portion) shaft just before the threaded portion.

But in my case, being that the smaller end of the strut shaft is fully threaded, might the snug fit of the "sizing bushing" eventually cause damage to the threads as well as giving unwanted sideways play?

What if i had threads machined into the inner diameter of the "sizing bushing" so that i could just screw on the bushing from the top of the strut mount and into the inner space normally ocuppied by a "sizing bushing", and still with that bit of protrusion for the locknut to contact of course. What do you guys think? Thanks Again!
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1979 924 U.S. version
Single sidedraft Weber 40

[Patrick]

OOPPSS, i failed to think about the fact that even if the O.D. of the bushing fit ok at the 14mm diameter bottom part of the bearing inner race (as viewed from the concave portion of the strut mount facing down), there is still the top portion of the strut mount (the convex portion facing up) where the "hole" is larger than 14mm. So i could just have a second bushing made with an ID of approximately 14mm, just enough that the 1st bushing fits snugly into it.

Is this perhaps overkill? Or should i just have a regular UN-threaded "sizing bushing" made to fit snugly on the (threaded) shaft?

If i could be assured that using a standard UN-threaded sizing bushing would absolutely not damage any threads, then i would rather go for this. What do you guys think?
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1979 924 U.S. version
Single sidedraft Weber 40

[Rasta Monsta]

Super easy to thread a spacer. . .I think I would want it screwed down with a drop of Loctite.
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[Patrick]

To be honest, i`ve never threaded anything in my life. I`m sure its as easy as you say it is, but i will just have the same machinist fabricating my bushing do the threading as he is charging a fairly modest fee, but only if i decide to go this route...

Which brings me back to my original question: Will using a snug fitting UN-threaded bushing do any harm to the threads? I`m thinking it wont, since the bushing will be pushed firmly and end up rotating with the strut`s shaft, essentially becoming one rotating unit? Do i understand this right? Comments, please, so i can finally get my struts back on and drive it!
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1979 924 U.S. version
Single sidedraft Weber 40