Eibach pro kit lowering springs installed, passenger rear side sits 7/8" higher than driver side.

[Doobage1922]

Recently had Eibach pro kit lowering springs and Bilstein b6 struts and shocks installed. Replaced Eibach sportline springs. The rear passenger side sits 7/8" higher than rear driver side. Dealership has had it back twice. Said it needed to settle. 2500 miles later they say install is good, must be the springs.
Does anyone know or have any information why this might be happening?
My next move is to put my old Eibach sportline springs back on. The ride is fine, the height is OK except for the rear passenger side.
The car doesn't handle as well as it did with the sportlines. It did scrape in certain situations, but for better performance I can avoid certain areas and be careful. Anyone else have this issue?

 

[DieHarder]

Pull the rear springs and measure them side by side. If there's a difference you've found your problem. If not, likely something mechanical (spring install position/obstruction/something bent?). If no difference swap in the old springs and remeasure. If the car measures out the same on the ground side to side I'd say it's time to send the new springs back because the spring rates are different.

 

[JC SSP]

Or swap the rear springs and if the issues remains on the passenger side you know it’s not the spring.

 

[86GT351]

With rear springs the bottom coil needs to be clocked appropriately. General rule of thumb is the end of the bottom coil should be facing down the centerline of the differential towards the driver side. If they are not this way, it can/will cause a ride height issue.

 

[07 Boss]

With rear springs the bottom coil needs to be clocked appropriately. General rule of thumb is the end of the bottom coil should be facing down the centerline of the differential towards the driver side. If they are not this way, it can/will cause a ride height issue.

I've never clocked my rear springs. Changed them a few times. How can there be a height difference from which way your springs are facing? I mean the perches don't have a relief to set it a certain way.

 

[JC SSP]

Like Jeff said…Rule of thumb is the pigtail points inside, but I am not sure if this is the OP issue?

 

[86GT351]

I've never clocked my rear springs. Changed them a few times. How can there be a height difference from which way your springs are facing? I mean the perches don't have a relief to set it a certain way.

It's a valid question. I do not have a specific answer for you. I have always been suggested to do that.

 

[GriffX]

The ride high is a function of the weight on the wheel. Do you have something heavy on the driver side? Have you put the car on scales?

This settling of springs isn't valid anymore, I knew somebody working at Eibach (they produce springs for the Formula1 too)

 

[Samos3]

The ProKit is a progressive rate spring versus the Sportline. So, a little softer.
I had the ProKit on my old 87 RX7. Really liked them, but could tell the trade off between performance and comfort.

 

[07 Boss]

It's a valid question. I do not have a specific answer for you. I have always been suggested to do that.

Well shit, now I'm going to be looking every time I under there to see which way my little pigtails are pointed. Thanks!

 

[05stroker]

Well shit, now I'm going to be looking every time I under there to see which way my little pigtails are pointed. Thanks!

They line up in the rubber grommet on the perch. IIRC the writing on the spring will face out.

 

[07 Boss]

They line up in the rubber grommet on the perch. IIRC the writing on the spring will face out.

Well this is one side. I guess it's pretty close, but my rubber perch is flat all the way around.

 

[Autokyrios]

What's your panhard set to? Do you have an adjustable panhard bar? If you're lowering the car, and you didn't change the length, the rear axle will sit funny.

 

[Doobage1922]

With rear springs the bottom coil needs to be clocked appropriately. General rule of thumb is the end of the bottom coil should be facing down the centerline of the differential towards the driver side. If they are not this way, it can/will cause a ride height issue.

Both springs, tail pointed that way?

 

[Doobage1922]

Like Jeff said…Rule of thumb is the pigtail points inside, but I am not sure if this is the OP issue?

Both pig tails? Point into differential?

 

[Doobage1922]

The ride high is a function of the weight on the wheel. Do you have something heavy on the driver side? Have you put the car on scales?

This settling of springs isn't valid anymore, I knew somebody working at Eibach (they produce springs for the Formula1 too)

Nothing of weight on either side.

 

[Doobage1922]

What's your panhard set to? Do you have an adjustable panhard bar? If you're lowering the car, and you didn't change the length, the rear axle will sit funny.

Adjusted the panhard.

 

[thump_rrr]

Have you tried swapping the coils to see if the sag switches sides?

 

[Autokyrios]

Highly doubt the direction of the coil is going to matter much with the stock seat, not to mention nearly an inch of difference is a lot. If you're sure you're adjusting the panhard right (loaded) then yeah, try swapping the springs around. That won't show a total reversal even if it is the spring, but can rule it out. If you still have the stock springs, you can throw those in on both sides and see if the problem still exists.

 

[86GT351]

Highly doubt the direction of the coil is going to matter much with the stock seat, not to mention nearly an inch of difference is a lot. If you're sure you're adjusting the panhard right (loaded) then yeah, try swapping the springs around. That won't show a total reversal even if it is the spring, but can rule it out. If you still have the stock springs, you can throw those in on both sides and see if the problem still exists.

It is actually a proven fact that they should e facing a specific direction. Even Eibachs directions talk about spring orientation. I personally have experienced this issue myself.