I recently installed HKS RS Coilovers on my G35 coupe... The ride is awesome and there was very minimal sound. However recently, the right side rear makes a loud bang sound when hitting small bumps. The sound is a lot louder than normal, and it just started making this sound recently. Any suggestions or ideas? I checked it yesterday and the top mount is in secure, so I still can't figure it out. Also, the dampening is still adjusting as well.

 

Bump stop?

 

I have the same problem with my RS. It happens to both my rear sides, and also I hear squisshy / ring sound from the shocks everytime I drive over uneven roads... I couldn't figure out, I called HKS and they recommends i bring it back to where I bought. the prioblem is, I bought it from the states and i live in canada

 

damn...i just ordered the same coilovers. i hope i dont have the same problem

 

i just installed these coilovers on tuesday and had no noise issues yet

 

i was wondering if maybe i am missing some sort of bump stop or bushing, anybody with the same set up, does the rear shocks have any think of this sort.............

 

lower spring mount?

 

jason do you just sell parts or do u do service them also, if you do service them, i will be more than happy to take my car in to you and have you look at it too see if anything is wrong with it

 

Do these shocks have any valve to add air? I used to have some air-over-oil shocks that would slam on bumps because the air pressure in the shock wasn't the correct psi. I had to add air pressure to them to correct the problem.

My shocks had a separator disc to separate the air and oil. The air pressure was designed to be compliant when you had large impulse inputs - like a pothole or seam in the road. The idea is that the valving for the damper (the oil side) wouldn't have time to react, or compress quickly enough... so the air does (since the air can be compressed and the hydraulic fluid can't). If the air chamber pressure is too low the air would compress too much and the separator disc would slam into the top of the shock.

Your problem sounds very similar to what I experienced. And if your damping still works, then it's prob the air chamber pressure. I'm not familiar with these shocks, but HKS should be able to tell you how to fix the prob.

 

i dont think these shocks have a place to add air, can anybody confirm this????