1986 Rear Camber Adjustment Bolt
 

Is bolt rotating? If not a bushing(s) is deteriorating at a rapid rate

That's about the only thing I can think of. Unless the bushings aren't thick enough is the only other thought I have.

If you can't get it resolved, about the only other thing I can think of is something like the Banski parts, pretty much impossible to shift as long as the collars are properly tightened up. All adjustments are via the heim joints on the part.

Camber
 

there should be a set of metal bushings on each side of the camber rod assembly, PN 14060166. is everything correctly configured? just asking. the I.D. of the sleeve within the camber rod is larger than the O.D. of the adjusting bolt. without the 14060166 bushings, the camber rod could have, or would have, some movement regardless of the amount of torque on the adjusting bolt. sounds like the bushings maybe MIA - at least on one side.

https://cimg1.ibsrv.net/gimg/www.cor...6199b51fe4.jpg

https://cimg9.ibsrv.net/gimg/www.cor...4bde90873f.jpg

https://cimg7.ibsrv.net/gimg/www.cor...37c58c98af.jpg

these are work in progress pics, but you get the idea. BTW, OE parts are discontinued and residual NOS parts are crazy expensive. IF you need to purchase the bushings, reproductions are available - about $10/pack of 4 (plus S&H) here's corvette central - https://www.corvettecentral.com/c4-8...et-of-4-584103

:rock:

..... Changes in ride height will also affect the camber adjustment ... maybe your car didn't get jostled around enough after the new bushings were installed .....

:iagree:

I have the Banski lower spindle arms, quick easy and precise accurate adjustment that doesn't change. I would never go back to the offset camber bolts.
:rock:

I seem to recall, 187 ft.lbs. across the board for all C4's. personally, i'd verify that for 1986 corvette specific. :rock:

..... I have taken a bunch of these apart and have never seen a lock washer on a camber eccentric bolt & nut ... at these torque levels , a lock washer could easily break and fall out leaving the bolt dangerously loose .....

The kit came from Zip Corvette. I just searched the web and every kit has the locking washer. I am not saying they are right but; I had no idea it didn't belong. I thought I was done with this.

:iagree:

I have referenced the 84-93 Y-body parts and illustrations manual, and there is NO lock washer associated with the cam bolt rod adjustment assembly. if aftermarket kits are supplying a lock washer, they are wrong. now whether the lock washer is OK to use or not, I really can't comment. the only thing I can say for sure is there was no lock washer from the factory, and with the amount of torque applied, any additional locking device, IMO, is overkill.

https://cimg4.ibsrv.net/gimg/www.cor...63cfed3d0f.jpg

:rock:

edit: it seems that a lock washer is called out for use with the 63-82 cam bolt assemblies. not sure why it was eliminated in 84, but i'm guessing using the additional lock washer for the C4 won't impact anything. to use it or not, your call....

The C4 rear camber adjustment is a bit notorious for having the eccentrics move and change alignment. The previous owner of my 96 experienced this when autocrossing on sticky tires. Banski arms were definitely the solution. That said, I can imagine that the urethane bushings make it more likely that the eccentric can move. They don't allow compliance with out-of-axis camber arm movement, yet they have to move out of axis (fore and aft at the upright) because of the arcs the trailing arms cause. You can imagine them "walking" the eccentric bolt in and out, because they don't allow compliance in that plane like the rubber bushings did.