[jvit27]

Originally Posted by fitchesbass

and Jt designs.

JTD's won't work with Koni's.

[Synenergy52]

Thanks for the picture!

Update: I ordered a new RSM and two oem washers. Should be here Monday. I'm obsessing about whether or not it's safe to drive my car. Yes worst case scenario my shocks pop out on a bump. Whats holding the pressure of the shocks? it seems without that cupped washer, it's simply being held in place by the rubber bushing? If that's the case I may have weakened the drivers side RSM. I've been driving my car very gently lately in fear the shocks will push the bushings out. I won't dare put my top down until I resolve this. I can only imagine what those rear shocks would do once they shoot up through the convertible well with the top folded inside.

Originally Posted by gripenM

the one on the right is a proper rsm set up, missing in the picture though is
another cupped washer that goes on top of the RSM as well

i went with OEM, but i used E46 M3 RSM with Z3 reinforcement plates (gold things).
feels very good, it's quiet and i've had it for 16,000km and i like it so far.

[Synenergy52]

btw gripenm, amber on estoril looks great. i think i want to switch back.

[falciott]

That's why the top and bottom washers are needed, they compress the bushing, otherwise if the rubber is allowed to stretch in either direction, it would slide out of the metal plate like a snail out of its shell.

[pbonsalb]

Originally Posted by jvit27

JTD's won't work with Koni's.

JT Design rear shock mounts work fine with Konis. I ran them for 3 years with Koni SA plus H&R Sports.

The only Konis they do not fit are the top adjustable rears that come with or are an added cost option on coilover kits. When I upgraded my suspension to TCK coilovers which have the top adjustable rears with the thicker shaft, I used the TCK RSMs (which are made by JTD) although JTD said I could modify the standard JTD mounts as an alternative.

[pbonsalb]

Originally Posted by Synenergy52

Whats holding the pressure of the shocks? it seems without that cupped washer, it's simply being held in place by the rubber bushing?

The cupped washer limits upward travel. The last 3 inches of the shaft is thinner than the rest of the shaft. The thin part goes through the cupped washer but the thick part cannot. Then once the thin part is through the cupped washer and through the RSM body and RSM bushing and into the trunk area of the car, a washer and nut go on top to hold the whole assembly in place. To allow the RSM bushing to cushion the shock action, the hole for the shaft in the center of the RSM body has to be bigger than the shaft diameter. Thus, with no cupped washer, the shaft can poke right through into the trunk. It might take a few miles but it will happen.

If this has happened, I would probably buy a new RSM unless I could assure myself that there was no damage to the RSM bushing or the hole in the RSM body. Some aftermarket RSMs can be easily disassembled, like the JTD, so you could make this complete inspection. Not sure if you can get yours apart but would assume it is possible.