digitalmike

Hi, so i just lower my C6 z06 on Eibach lowering links and now suspension makes rattling noise and it sounds like suspensions is hitting something when driving over the bumps. Its driving me nuts! please advise...

Apocolipse

Probably because you are lowered to a point of resting on the bumpstops always.

jayyyw

maybe sway bar end links?

NemeZ

I have Vms lowering bolts and mine starts to creak after a while. I just lube them up with grease and they get quiet again.

meanjoe

What were your before and after measurements?

MTPZ06

Probably bottoming out on the shocks if you went real low. If you drop the car 1.5" for example, you've essentially eliminated 1.5" of suspension travel...and have probably created alignment issues, bump steer, etc. If its me; throw the OE bolts back in there if they're in good shape, turn them down as low as they go, and be good with something closer to 3/4" drop without all the side effects.

meanjoe

Looks like the OP is gone???

digitalmike

Hi guys, Sorry for the late response but this every day NYC rat race is killing me and besides work I don't have time for anything else. Anyway I will take the car back to the shop and lift the suspension back up. I did drop the car a lot on the new links when installed. Also I installed DRMs so it made the ride even more harder compering to Oem shocks that were there originally. I changed my lowering links because my original ones were gone. Rubber was deteriorated to the point metal was hitting the Lowe control arm. I was trying to buy oem links but apparently dealer won't sell
them separate without the leaf spring ... which is really strange. I will keep you posted later this week what's the outcome on the links. Also I will grease them as someone mentioned here because the back started squeaking after install.
By the way my car is a 09 with 23k miles. stock other then this 2 modes I did now. Also waiting for kooks headers and intake I ordered recently. Planing to do my heads and cam this summer as well. Bought the car two months ago at the auction as a project.

Apocolipse

If you find the ride hard and dont track the car...have the shop cut the bumpstops to a shorter length. This will give you some compliance back into your suspension but wont be as linear. I hear you on the rat race...this is why we need high hp cars.

meanjoe

The DRM's actually have a softer ride than the OEM's do. I have a set on my car but never lowered it. I think your rough ride is just a result of lowering the car too much.

MTPZ06

OP, most aftermarket bolts deteriorate faster than the OE ones. Yes, its odd that GM doesn't sell them separate, but Corvette Central sells reproduction bolts for $30/pair... http://www.parts123.com/corvettecent...50h&ukey=35347

digitalmike

So finally an update on the matter.
My original links were shot and could not reuse them so thats why i got eibach links. I did grease them so the squeaking disappeared. Raised the car back 5/8" in the back and now the rear suspension behaves better. As for the suspension noise in the back, i took out right shock and reset it back as thats where the noise was coming from. No more nocking noise of bumps. Im not sure what it was as all the screws were tight but it helped! Im waiting on my Kooks headers to arrive from ceramic coating and will probably do the heads and cam as well. I will start a new post on before and after results. I Also bought fast 102 and beehave. Thank you for your comments and help.

Les

Good info on all counts here. About 3-4 months ago when one of my rear factory bolts snapped the bushing part off I was told, by folks who know, that aftermarket bolts tend to fail pretty quickly. I wasn't looking to lower my car anyway, so a friend of a friend sent me this same link for the Corvette Central repro bolts/bushings. They look just like the factory ones and took care of my problem. Some disassembly is required.