turbogrill

I have a clonk in the right front that I can't figure out what it is. It started appear when I installed coil overs (JIC ZMS ). The coilovers has monoball camber plates, so not using stock shock mounts.
It is most noticeable going over dips/potholes, so sharp edges. Doesn't matter if I turn or not. The faster the more violent the clonk is.

Have done the following in:

1. Replaced lower control arms (the one with the ball joint)
2. Replaced lower control arm link (tuning fork)
3. Tighten the top nut of the coil overs and greased everything.
4. Inspected the strut mount camber plates
5. Inspected the drop links, they felt fine and no play
6. Inspected tie rods, felt fine and no play.
7. Inpsected the swaybar bushings (might as well replace these, cheap and easy).
8. Fastened the spare tire bolt.

I can't think of any more suspension components to replace/inspect.

Any ideas?

Gert

Make a test drive with disconnected front drop links. Zip tie them out of the way...

If that doesn't solve the issue, swap the left and right struts as it might be the shock.

turbogrill

That is some good advice!

thanks

dkraige

These are the 2 that I tracked down:

https://rennlist.com/forums/996-foru...-arms-wow.html

https://rennlist.com/forums/996-foru...ght-turns.html

Sounds like you've already replaced things; just make sure everything is torqued correctly. "Pretty tight" is not tight enough on some of the control arm fasteners and will allow things to shift and clunk.

Vancouver996

turbogrill

Yes, replaced most of them. Only swaybar bushings left, they look good but will replace them for the sake of it.

Gregcoleman81

Before I purchase these, did you solve the clunking issues?

turbogrill

No, in the end I accepted it as going to fast over potholes with stiff suspension.

My race car Miata does a similar thing but the clonk is more of a bang (maybe because I have a helmet and no muffler).

Someone said that this is what monoball (spherical bearings ) top mounts do and the price you have to pay for the increased performance, however I am not a suspension expert so can't really comment on that.

I apologize if this was not clear but it's mentioned in the AD.

Edit:
Just remembered someone also said that the bearing might be a little worn and that causes the clonk. But again, I don't know if that is true.

JTT

I can confirm that a worn monoball will knock. I have them on my fronts and although I couldn't really "feel" any play with the bearing in hand, when I replaced them with new bearings, the noise was gone completely.

turbogrill

How did you replace them? Pressed them out?

I removed the shocks to sell them (restoring the car to stock). The handling was amazing with these.

thanks