View Full Version : how to adjust Koni rear...


UDM Motorsport
04-04-2006, 09:10 PM
i tried searching but its disabled.

Well...right now i have koni single adjustable shocks in the rear.
I'm not really sure how to adjust it, and i tried it earlier and not sure
if i did it right.

The PO said the shocks are currently set to full soft.

Here's what i did.
Remove the 19mm nut on the bottom.
Compress the shock upwards. (suprisingly soft with some pressure)
Once fully compressed, i turn it CW (if facing from below). I dont hear
any clicks and it turns freely. It very slowly decompress. then i try
compressing...no difference.

Then i tried turning it CCW...same.

So which way am i suppose to turn it? and is this a good way? or do i have
to pull the whole shock out?
Also, with it decompressing really slow, is this a sign of a blown shock?
when i compress it, it seems soft, but not blown. Are Koni shocks
rebuildable?

advice? tips?

thanks
franklin

deeda
04-04-2006, 09:41 PM
Yeah I just put them on my car. I was kinda confused by the instructions.....
So this is a good thread. Thanks

Racer01
04-04-2006, 10:13 PM
I believe the "compress to adjust" shocks must be completely removed from the rear of the car for adjustment. They must be fully compressed, which cannot be done while on the car (rear shock mounts and/or bumpstops prevents this?)

Check this out:
http://www.ajusa.com/cgi-bin/load?t=koni/koni_adjust.html&ajr_skey=240411b571e3d7164555108d706393e9

vrsixer
04-04-2006, 10:57 PM
I believe the "compress to adjust" shocks must be completely removed from the rear of the car for adjustment. They must be fully compressed, which cannot be done while on the car (rear shock mounts and/or bumpstops prevents this?)

Check this out:
http://www.ajusa.com/cgi-bin/load?t=koni/koni_adjust.html&ajr_skey=240411b571e3d7164555108d706393e9
I agree, I just did this over the weekend, and I think the shock should be fully disassembled and then you can compress the piston and adjust accordingly.

UDM Motorsport
04-05-2006, 12:47 AM
thanks a bunch. I'll try this over the weekend.

deeda
04-05-2006, 02:21 PM
well that sucks......

I guess I'll put them in the middle and leave them.

Kos-motate139
04-05-2006, 03:03 PM
They can be adjusted on the car, it's just a tremendous pain, but you do have to at least undo the lower attachment bolt as you did.

There are two stops that need to be removed, first the white plastic one that dangles around the shaft end, then a second black rubber one that gets jammed up in the top inside the dust shield. I was able once to stick a piece of wire up there and pull it out with the shock on the car; its just easier when its off.

Anyhow, once you get both stoppers out, then you will be able to feel a difference as it clicks in and turns to adjust. With stock springs on an M3, I liked the medium setting; the stiffest setting caused jacking down and extremely 'interesting' snap oversteer just when you didn't want it.

Good luck!

mikeo
04-05-2006, 05:35 PM
...Also, with it decompressing really slow, is this a sign of a blown shock?
when i compress it, it seems soft, but not blown. Are Koni shocks
rebuildable?
Since the Koni SA is adjusting only the rebound, not the compression, you mainly notice the rate at which the shock expands back to extended position after it is compressed. A slower rate of extension is indicative of a more firmly adjusted schock. Faster extension = softer adjustment.

And yes, they are rebuildable, and can be rebuilt with custom valving specifications.

FierySphere
04-05-2006, 07:38 PM
They can be adjusted on the car, it's just a tremendous pain, but you do have to at least undo the lower attachment bolt as you did.

There are two stops that need to be removed, first the white plastic one that dangles around the shaft end, then a second black rubber one

I truely doubt you can compress the shock enough to adjust the setting, if there is *any* bump stop rubber on the shaft. And there should be on a street car...

Removing, as much as a PITA as it is, is the only way, IMO. That's why I dumped my compress-and-twist SA's for the externally adjustable ones :)

Greg S
04-05-2006, 09:18 PM
Top Adjustable FTW.

Kos-motate139
04-06-2006, 03:14 PM
I truely doubt you can compress the shock enough to adjust the setting, if there is *any* bump stop rubber on the shaft. And there should be on a street car...

Removing, as much as a PITA as it is, is the only way, IMO. That's why I dumped my compress-and-twist SA's for the externally adjustable ones :)

Well, that's why you remove the bump stop rubber. :) There are small holes at the top of the dust shield to poke at it to loosen it, then use something to hook it and pull it down. It's a split ring, so it's easy to get off the shaft. Once off, it's a one-hand operation to adjust the shock.

Anyway, agreed, the externally accessable ones are certainly easier...for as much adjustment as is necessary from an SA shock.