What suspension do you suggest for my needs...?

[Shumax]

Are you sure it's a "clunk" and not a metal screech or pop?

Assuming it's not something as dumb as nuts and bolts not being torqued down properly, the most common cause of coilover noise is the springs rotating under compression and grinding against the perch/mounts. This is not a Z problem, it' s a universal coilover problem for any units without thrust washers or bearings.

also, the "Nismo" coilovers you got from the factory aren't Nismos.
They're rebranded KW's, the last we looked at it.
They should be using rubber mounts everywhere as they're comfort oriented for soft drivers.

100% a clunk.

 

[Shumax]

As a, minor, update - I had my local mechanic look it over and there was nothing 'obvious' found. I'm taking it to Nissan on Saturday.

I still don't know which direction to go if they tell me the sound is 'normal.' I honestly can't believe that will happen as the noise is very noticeable and loud. But, trying to be prepared for that so I know which direction to go - springs, or different coilovers.

Thanks again...

 

[OptionZero]

As a, minor, update - I had my local mechanic look it over and there was nothing 'obvious' found. I'm taking it to Nissan on Saturday.

I still don't know which direction to go if they tell me the sound is 'normal.' I honestly can't believe that will happen as the noise is very noticeable and loud. But, trying to be prepared for that so I know which direction to go - springs, or different coilovers.

Thanks again...

has anyone pulled the coilovers off the car to actually look at them

is this “local mechanic” someone versed in aftermarket suspension specifically coilovers?

i would go to a true suspension shop that works on this stuff and not a general mechanic

 

[tractng]

To the OP, is this your first modified car?

 

[Shumax]

To the OP, is this your first modified car?

No, far from it....

 

[Shumax]

has anyone pulled the coilovers off the car to actually look at them

is this “local mechanic” someone versed in aftermarket suspension specifically coilovers?

i would go to a true suspension shop that works on this stuff and not a general mechanic

Likely not, but I wanted him to have a look as I know him well. It's at a Nissan dealer, now, and they will start looking at it tomorrow...

 

[Shumax]

I am still trying to get an idea of what to do, so I can be prepared, should this not sort well. Go with another set of coilovers? I see some suggestions, but was hoping for many in the same bucket. Maybe that's a dream? Or, add springs (which ones) to the stock NISMO dampers. Thanks again...