8 replies to this topic

[MiniGadget]

I have just installed new gaz adjustable shocks/ dampers, after my koni's were said to be knackered.
I now hear a loud bang sound when I hit a good size bump in the road.
Not sure if it was doing it before, because I have only just got it roadworthy.
It is a 1965 Austin cooper s.
Old looking hi Lo suspension, will I need to raise or lower the hi lo's or do you think it would be something else?

[nicklouse]

I would have said worn shocks.

But it could be anything. From incorrectly fitted parts to loose or worn parts.

Or you are expecting more from your suspension than it will do.

[mab01uk]

Lowered Hi-Lo suspension with wrong length shocks/dampers that are bottoming out maybe?

eg. Spax dampers are available in standard length and shorter length for lowered cars, dimensions here:-

https://www.minispar...c/C-STR304.aspx

 

Also check all your rubber bump stops front and back are ok.

https://www.minispar...ic/FAM2764.aspx

https://www.minispar...c/2A4267MS.aspx

Edited by mab01uk, 24 December 2017 - 09:48 AM.

[MiniGadget]

Thanks, I got the standard height shocks, because my old konis were standard also. It is reasonably high and I don't have the body type bump stops.

[cal844]

It could be the radius arm, my mate had this issue,

Was actually a combination of knackered shocker and poorly reconditioned radius arms

[dyshipfakta]

Could be anything though how confident are you its suspension related? Subframe mounts, engine mounts, exhaust the list is endless lol

[sledgehammer]

I would check subframe mounts / radius arms / etc all round

 

also when fitting did you prime the dampers ? (not sure if gaz dampers need this) -

 

hold them upright , push them thru their full travel , to force any air from the chamber ?

 

air in the damping chamber can make a loud knock

[NZMini1275]

I had this with my fully rebuilt car
Checked over everything and all seemed fine
Decided it might be shocks bottoming out so changed the standard mounts to lowered ones and now all good

[nicklouse]

Ok let's discuss lowered shocks. The main reason for needing them is not because of the low ride height as the top stops are just the same as standard, the difference is reducing the amount the wheel drops. This can also be rectified by an 1/8" spacer under the rebound buffer. You do have the rebound buffers fitted? If not the HiLos and cones could be unseating.