Help. C6 is lowering itself.
Thread Starter
Instructor
Joined: Mar 2019
Posts: 174
Likes: 18
From: Sacramento
Help. C6 is lowering itself.
Hi. My 2007 C6 is lowering itself. The rear was sitting very low so I raised it back up to 28 inches last night. Double checked ride height in the morning and it was at 28". I could fit about 3 fingers between the tire and the fender well.
I drove 20 miles to work and the rear lowered back down to about 25". What could be the problem??
There was about 5 threads left on the top of the adjustment screws when I got got it up to 28". Should I have run screw down all the way?? Any help is appreciated. Thanks.
I drove 20 miles to work and the rear lowered back down to about 25". What could be the problem??
There was about 5 threads left on the top of the adjustment screws when I got got it up to 28". Should I have run screw down all the way?? Any help is appreciated. Thanks.
Burning Brakes
Joined: May 2015
Posts: 1,039
Likes: 181
From: Lockport IL
I would check for a cracked spring, rubber deteriorating on bottom of adjustment bolt, make sure the threaded insert in the spring has not broke loose, and inspect suspension for something damaged or loose. Good luck.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
You can get replacement ride height bolts, so kind of like throwing the baby out with the bath water if you just need to replace the ride height bolts.
https://www.corvettecentral.com/c6-0...2f%3fcount%3d9
As for when you have the trans springs out to change the ride height bolts on them, double check the springs, since they can be cracked from just someone using the wrong solvent to clean the under carriage.
Also, set your ride heights, then come back a few days later to double check the heights after the pads have taken a set intial compression/the suspension has taken its set.
https://www.corvettecentral.com/c6-0...2f%3fcount%3d9
As for when you have the trans springs out to change the ride height bolts on them, double check the springs, since they can be cracked from just someone using the wrong solvent to clean the under carriage.
Also, set your ride heights, then come back a few days later to double check the heights after the pads have taken a set intial compression/the suspension has taken its set.
Thread Starter
Instructor
Joined: Mar 2019
Posts: 174
Likes: 18
From: Sacramento
Thanks Dano. I did the researched and it seems like all the aftermarket height adjuster bolts go bad prematurely. And the Delrin pads are out of stock. Are the ones you listed just as good a the OEM ones?? They look exactly the same.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
Yes, they are the same as the oem units, and will last as long as the OEM ones.
Hence I tend to change them out about every 40k, since this is about the mileage that I get out of the shocks before they need to be replaced as well (even the B6 shocks).
Plus at the 40k, give me a chance to check/dielectric grease the rest of the bushing including the sways, replace the sway end links that only last about as long, to make sure that the suspension is still tight as well.
As for ride heights, pick your poison, but I will re-corner balance the car in the end. Hence ride height gets me in the ball park to start with, then the car is put on scales to finalize the corner balance of the car. Also, corner balance is checked yearly, since even the stock type OEM pads will compress over time, before the 40k mark again.
As for tran springs, tends to change these out around the 80K mark since they loose spring tension over time as well.
If you go to coil overs (make sure that the shocks are rebuild-able), then rebuild them at the 35k mark, and double check your settings/corner balance yearly as well.
Hence I tend to change them out about every 40k, since this is about the mileage that I get out of the shocks before they need to be replaced as well (even the B6 shocks).
Plus at the 40k, give me a chance to check/dielectric grease the rest of the bushing including the sways, replace the sway end links that only last about as long, to make sure that the suspension is still tight as well.
As for ride heights, pick your poison, but I will re-corner balance the car in the end. Hence ride height gets me in the ball park to start with, then the car is put on scales to finalize the corner balance of the car. Also, corner balance is checked yearly, since even the stock type OEM pads will compress over time, before the 40k mark again.
As for tran springs, tends to change these out around the 80K mark since they loose spring tension over time as well.
If you go to coil overs (make sure that the shocks are rebuild-able), then rebuild them at the 35k mark, and double check your settings/corner balance yearly as well.
