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05 CTS-V
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115 Posts
Discussion Starter #1
Put some H&R springs, z06 endlinks, and MM spacers on 2 weeks ago.

Just this weekend its started clunking and its gettign louder.

Could the struts be bad? It sees to only be on the drivers side and I can feel it in the floor when it clunks.

I'm wondering if the endlinks may have loosened also becuase the dealer didnt have the lock nuts made for it so I used a nut and lock washer.
 

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2005 CTS-V
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274 Posts
Check the fasteners for your sway bar. You don't even need to take off the wheel. Jack up the front and turn the steering wheel toward the corner you are working.
 

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2,090 Posts
I use to have a clunk only when i turned to the left...It was my end links, they broke....
 

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2004 Raven Black CTS-V
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135 Posts
Is the ride feel "bouncy"? Were any of your shocks covered in oil? Could possibly be a blown shock.
 

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2012 CTS-V Sedan, 2011 CTS Coupe, 2010 Ford Raptor
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3,547 Posts
I have a clunk when turning left hard. Dealer and my performance shop have looked and cant figure out what it is. End links are good and everything is tight. Oh well.
 

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05 CTS-V
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115 Posts
Discussion Starter #6
Is the ride feel "bouncy"? Were any of your shocks covered in oil? Could possibly be a blown shock.
It's kind of bouncy, but not REAL bad. If I push down of the fender it'll do it also. When installing the springs I didnt notice any oil or anything.

I use to have a clunk only when i turned to the left...It was my end links, they broke....
Hopefully they didn't break. I put the Z06 endlinks on while it was on the lift and I didnt hear a snap...I'll have to put it up ion the air again and take a look.

Thaks guys
 

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2006 Raven CTS-V, Blacked out, Eibach Pro Kit
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75 Posts
Mine did the exact thing after doing my eibachs, i just figured my bolts werent tight enough so i took the entire suspension apart and tourqued everything down again. stopped for about a week now it is back worse than ever. getting really annoying.
 

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05 CTS-V
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115 Posts
Discussion Starter #8
Mine did the exact thing after doing my eibachs, i just figured my bolts werent tight enough so i took the entire suspension apart and tourqued everything down again. stopped for about a week now it is back worse than ever. getting really annoying.
That's not very re-assuring...lol

I may get to it this weekend to see if I can find anything out of the ordinary...If not, I'll be buying new struts....They're not to bad for some KYB's

PS....For your viewing pleasure






 

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2006 CTS-V
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897 Posts
Looks great! I wonder (and hope for my personal preference) if the front springs will "settle" to even out with the drop that the MM spacers give in the rear. Everyone that's been posting pics of newly installed H&Rs has shown the rear dropped a bit more than the front. With the spacers determining the drop for the rear, I dint think you'll get any "settling" there, but in the front I think we can expect a 1/4 inch or so.
I'll be doing my H&Rs, MM spacers, and Z06 links very soon. Not enjoying this read!! LOL
OP - How was the end link un/in stall for you? Did you do them with both sides of suspension fully unloaded? If so, did holes line up ok and all? Heard lots of stories here about links being a huge PITA to do.
 

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05 CTS-V
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Discussion Starter #10
Looks great! I wonder (and hope for my personal preference) if the front springs will "settle" to even out with the drop that the MM spacers give in the rear. Everyone that's been posting pics of newly installed H&Rs has shown the rear dropped a bit more than the front. With the spacers determining the drop for the rear, I dint think you'll get any "settling" there, but in the front I think we can expect a 1/4 inch or so.
I'll be doing my H&Rs, MM spacers, and Z06 links very soon. Not enjoying this read!! LOL
OP - How was the end link un/in stall for you? Did you do them with both sides of suspension fully unloaded? If so, did holes line up ok and all? Heard lots of stories here about links being a huge PITA to do.
Thanks!

My front has settled a bit, and it's about even...the back does sit a LITTLE lower, but I don't mind, and I wasn't going to cut perfectly good H&R springs to level it out.

I installed the endlinks with it unloaded. (it was on the lift). It wasn't a HUGE pain, but you will have to unbolt the sway bar from the frame (just back the bolts out a half inch or so) so you can move the sway bar onto the endlinks (if that makes sense).
 

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2004 Maggied CTS-V
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140 Posts
It's kind of bouncy, but not REAL bad. If I push down of the fender it'll do it also. When installing the springs I didnt notice any oil or anything.



Hopefully they didn't break. I put the Z06 endlinks on while it was on the lift and I didnt hear a snap...I'll have to put it up ion the air again and take a look.

Thaks guys
what type of lift? drive on or frame, was the suspension already loaded when you did the end links?
 

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2006 CTS-V
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897 Posts
HR springs sit consistently lower in the rear than the front. Probably to the tune of a 1/8 to a 1/4 inch.
Isn't it true that the MM spacers are actually what determine rear ride height? If so, it would be tough to say that it's H&R's design that has the rear sit lower than the fronts. Regardless, it seems to be pretty minimal. I'd be curious to see floor to fender lip measurements of front vs rear AFTER the fronts are given a few months to settle though... Just for curiosity's sake.
 

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2004 Maggied CTS-V
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140 Posts
Frame, it was unloaded.

My lift is in the pics
I believe, at least with the FBody it holds true, end links should be installed with the suspension loaded so that the geometry is correct
 

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2007 CTS-V
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612 Posts
Isn't it true that the MM spacers are actually what determine rear ride height? If so, it would be tough to say that it's H&R's design that has the rear sit lower than the fronts. Regardless, it seems to be pretty minimal. I'd be curious to see floor to fender lip measurements of front vs rear AFTER the fronts are given a few months to settle though... Just for curiosity's sake.
The MM spacers determine rear height only in the sense that they keep the rear shocks from auto-leveling and pumping up. The factor which always, and most directly, determines the rear ride height is how tall the springs are when they're compressed by the weight of the car. The job of the MM spacers really is not to make the rear of the car sit lower.. Their job is to keep the rear shocks from auto-leveling, which as a result allows the rear end to sit lower. If you want the rear end to sit any higher then you have to shim the spring itself and make its "installed height" taller.

The large thread I posted a while back about this setup has all sorts of ride height measurements in it. I could go out and take more measurements of my cars fender heights and post them, but I don't have to. The ride height hasn't changed one bit from the last set of numbers I posted in that thread probably 4 months ago at least.

Another thing that people may not be taking into consideration when measuring the difference in the apparent "drop" from front to rear wheels, is that the tops of the rear fender cut-outs may be lower than the tops of the front fender cut-outs, relative to a horizontal design plane of the car body. In other words. The height from ground to frame may be the same from front to back, but the wheel gap in the front is greater than the wheel gap in the back. There are plenty of cars which are designed this way; having shallower fenders in the back than the front. BMW and MB come to mind right away..
 

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2004 Raven Black CTS-V
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135 Posts
Actually, just to clarify. The MM spacers ALLOW the rear shocks to auto-level. By moving the shock attachment point up roughly 1.5 inches, you are keeping the rear shock geometry the same. When lowering the car without the spacers, you are compressing the shock 1.5" at rest. Because of this, the nivomats auto-level themselves...raising the car as they reach their natural compressed position.
 

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2007 CTS-V
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612 Posts
The auto-leveling "action" of the struts is employed when the rear shock geometry is far enough out of its original specification (i.e. when you have too many fat chicks in the back seat, or you decide to put shorter springs in). If you maintain the original shock geometry by adding the MM spacers, no auto-leveling action is required or occurring. This doesn't mean however that the shocks won't auto-level if you use the MM spacers, H&R springs, AND decide to fill your back seat with fatties. The operational characteristics and behavior of the shocks are still the same as before.
 

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Black 2005 CTS-V
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94 Posts
I believe, at least with the FBody it holds true, end links should be installed with the suspension loaded so that the geometry is correct
I believe its the same for caddy's. I just had my h&r springs installed with MM spacers and I am about to order z06 endlinks and do them in my driveway.
 

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05 CTS-V
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115 Posts
Discussion Starter #20
Well, the car has just been sitting in the garage for ther past few weeks, I went ahead and ordered new KYB front struts, and they should be in this week. So I'll throw it up on the lift and start on it this week.

Keep everyone updated....but the noise is just unbearable. It almost sounds like the seal on the piston insode the struts is gone and its metal on metal in there. I still havent pulled the wheel off to take a look, so there could be oil from the strut all over the place.;
 
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