Torsion Bar Tube End Repair ('69 911e)?

[TC911e]

Does anyone have suggestions on how to go about repairing a rusty end of one side of my rear torsion bar tube? The left side seems ok, but the right side is pretty rusty (and the inside of the tube doesn't look too bad past the end).

Left side


Right side


I've done some searching here and over at the earlyS forum (and posted the same question there), but most of what I found it for full torsion bar tube replacement (and I don't think I need that). I bought one of these sleeves from Restoration Design that slides up inside the tube (hoping that might do the trick), but it would just go in over the rusty part (and apparently would require a different size bushing since it reduces the size of the tube opening



I suppose the right answer might be to clean it up, treat it, paint it and reassemble the rear suspension, but ....

I just took it off of the octisserie (which had these ends covered up for the duration of the rest of the rust repairs), and I was thinking/hoping that I was about done with the rust repairs. Any suggestions would be appreciated.
Tim

[ian c2]

Have a look at the evaporust I used in this thread .
Finally got my car back !!!
It’s about halfway down the first page .
(Excuse the ramblings, I will clean up the thread when I get a chance)
I’ve since bought the gel version which may be better for you to cling to the sides and top .
Or you could soak a rag and stuff it in there , but this may need reapplying a couple times so will take longer than the normal 24hr soak .
You should get a sand-paper wheel in your drill beforehand to clean any loose stuff before you apply the rust treatment , and coat with epoxy primer once clean .
You can get right into the tube with a cavity wax “wand” that attaches to aerosol epoxy if needed .

I plan to try out the gel on some spots where window-net brackets where welded on my 73 this weekend .
Will post pictures.

[Sharkbitemarky]

www.impactbumpers.com/forum/index.php?/topic/30598-rear-torsion-tube-end-repair-bushing-intallation/

I did this ! May help.

[TC911e]

Wow! That’s pretty involved. Mine’s not nearly as bad as what you started with, but it needs something. The part you have labeled as TTREB might help, but I haven’t found a source.
Where did you find yours?
Tim

[Evans, Marv]

If it were me, I'd go the Evaporust route to clean up the metal and apply JB weld or epoxy and dress it using a sanding drum or flap sander. You seem to have plenty of "meat" left.

[Sharkbitemarky]

Originally Posted by TC911e

Wow! That’s pretty involved. Mine’s not nearly as bad as what you started with, but it needs something. The part you have labeled as TTREB might help, but I haven’t found a source.
Where did you find yours?
Tim

https://www.parts-wise.com/porsche-356/new-in-production/c93/porsche-911/body/frame-body-interior-panelling/c25/91133101rep-all-911-68-89-repair-endpiece-for-rear-torsion-bar-tube-fits-both-sides-and-is-to-repair-the-rubber-bearing-area-/p308309/

https://sportwagen-eckert.com/product_info.php?language=en&info=p12608_nr-1ck-repair-piece--rear-axle-torsion-tube-for-porsche-911--65-89.html

https://www.mecatechnic.com/en-GB/rear-torsion-bar-porsche-911-912-torque-bars-accessories~911-SUS-TOR-AVT.htm

Big difference in price !