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General Suspension: rear spring install & bumpstop cut

Old 07-13-2006, 10:10 PM
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rear spring install & bumpstop cut

ok this is how you install the rear springs..

step 1.. jack the rear of the car up onto jack stands and take the tires off like so..



step 2... remove this nut... you can use the lug wrench that came with your factory jack fits perfect




step 3.... now just twist and pull the spring out



step 4... cutting the bumpstop you dont have to cut it but i cut mine just pull the bump stop thingy off and cut away



i used a real sharp knife to cut mine



EDIT: i droped the rear 2.5" and was still hitting the bumpstop after i cut it.. so i just pulled the whole bump stop off and now i dont bottom out


step 5... now just install your new springs.... place the spring back in and jack it up a bit to put the nut back in




after install


lol.. now do the front asap


Disclaimer: Do not crawl under a car on jack stands... and I am under no reason responsible if you crush a fender or bodykit because you cut your bump stops Please drive safely & responsible.

Last edited by TommyP; 05-17-2012 at 09:55 PM.
Old 07-13-2006, 10:15 PM
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Thanks for the tutorial, using this I can probably put on sportlines myself.
What's the benifit of cutting the bump stop off?
Old 07-13-2006, 10:15 PM
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Wow! that was easy. Great how to
Old 07-13-2006, 10:18 PM
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really nice how too..and simple too doo...
Old 07-13-2006, 10:22 PM
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Because you're puting smaller springs on, the bumpstops have a chance of bottoming out...cutting them greatly reduces the chances of that...you would have to hit some pretty big bumps
Old 07-13-2006, 10:24 PM
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Originally Posted by ecotecon18s
Because you're puting smaller springs on, the bumpstops have a chance of bottoming out...cutting them greatly reduces the chances of that...you would have to hit some pretty big bumps
oh ok thanks!
Old 07-14-2006, 11:14 AM
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great how to.. thanks.. is there anyway you could get better pictures of the location where the jackstand is suppose to be? Also does both springs have to be done at the same time or can I just jack one end up do the one side then jack the other end up and do that side?
Old 07-25-2006, 10:39 AM
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Cut the bump stop LOL its worth it if not u will bottom out every where lol....
Old 07-25-2006, 11:29 AM
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Originally Posted by Re4peR26
Cut the bump stop LOL its worth it if not u will bottom out every where lol....
no you wont, i didnt cut mine and i have never bottemed out.. and yes you can do one spring at a time
Old 07-25-2006, 11:41 AM
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is it harder to do one spring at a time?
Old 07-25-2006, 12:04 PM
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Nice bumpstop how-to. Thanks for taking the time.
Old 07-25-2006, 12:07 PM
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Originally Posted by ecotecon18s
Because you're puting smaller springs on, the bumpstops have a chance of bottoming out...cutting them greatly reduces the chances of that...you would have to hit some pretty big bumps
You know, the bump stops aren't the size they are from the factory for looks.....
Old 07-25-2006, 03:32 PM
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yes you will bottom out ever where if you dont cut the bump stops..... i cut mine as seen in the photo above.. but it wasent enough i had to cut the rest of the bump stop off because every time i went over a bump i hit the bumpstop.... but after i cut the whole bump stop off i dont bottom out anymore... i will try to get new photos up.



.
Old 07-25-2006, 03:55 PM
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Originally Posted by Florida 76
yes you will bottom out ever where if you dont cut the bump stops..... i cut mine as seen in the photo above.. but it wasent enough i had to cut the rest of the bump stop off because every time i went over a bump i hit the bumpstop.... but after i cut the whole bump stop off i dont bottom out anymore... i will try to get new photos up.



.
I didnt cut mine. I bottom but I think in the front only. I have not seen details about doing the front. help me out. do you cut in the front as well?
Old 07-25-2006, 05:03 PM
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Originally Posted by Florida 76
yes you will bottom out ever where if you dont cut the bump stops..... i cut mine as seen in the photo above.. but it wasent enough i had to cut the rest of the bump stop off because every time i went over a bump i hit the bumpstop.... but after i cut the whole bump stop off i dont bottom out anymore... i will try to get new photos up.



.
What I'm trying to say is that did you ever think that the bump stop might be there for a reason, ie, serve a purpose? If the suspension is bottoming out and hitting the bumpstop, the proper solution is NOT to hack up the bumpstop!!
Old 07-25-2006, 05:13 PM
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Originally Posted by ssnipes
I have not seen details about doing the front. help me out. do you cut in the front as well?

no there is no bumpstop in the front... heres a good how to for the front

https://www.cobaltss.net/forums/how-guide-43/front-strut-spring-r-r-23418/




..
Old 07-25-2006, 10:09 PM
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Originally Posted by Bandit2941
What I'm trying to say is that did you ever think that the bump stop might be there for a reason, ie, serve a purpose? If the suspension is bottoming out and hitting the bumpstop, the proper solution is NOT to hack up the bumpstop!!

Well yes but I would expect Eibach had reviewed that. I know the dangers of doing something without thinking. but that is why were all here. Pardon me but were not stupid. we all know you should becareful not to cut if it means crushing fenders or the bump stop is no longer to do its job cause it is to short and then you hammer the **** out of your shocks (shocks become bump stop = death to shock). any way I know you were saying that incase we actually were stupid to not figure out that one on our own. thanks!
Old 07-25-2006, 10:12 PM
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Originally Posted by Florida 76
no there is no bumpstop in the front... heres a good how to for the front

https://www.cobaltss.net/forums/showthread.php?t=23418




..
So do people ever feel that the bottoming happens in the front when they have the rear cut?. that could be my problem then. bottoms in the rear actually? thoughts?
Old 07-26-2006, 02:00 AM
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so is cutting the bumpstops in the rear a bad solution?
Old 07-26-2006, 02:31 AM
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Cutting bump-stops is an absolute. Ask any suspension shop! It's drop spring 101 to them. If you think people are wrong, then grab a phone book and phone and call a professional. I've installed them on 3 cars now and all had the bump-stops cut. One I did not cut enough off and it happened to be my wifes. She said the ride was so rough she was going to punch my lights out if I didn't fix it! I cut more off and life was good for me again.
Old 07-27-2006, 11:41 PM
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How much do you cut off, half?? 3/4?
Old 07-28-2006, 09:51 AM
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Originally Posted by hardtocope
so is cutting the bumpstops in the rear a bad solution?
Originally Posted by Bowtied
Cutting bump-stops is an absolute. Ask any suspension shop! It's drop spring 101 to them. If you think people are wrong, then grab a phone book and phone and call a professional.
He is right. It is a very important. and is an important thing to do. just not too much though

but you have to consider not to cut to much. otherwise you may then just pull it out all together. WHy? to short means when the suspension compresses all the way the bump stop is cut so much that no contact is made to the bump stop (to short). if the bump stop cant do it job then the shock takes the blow that it is not designed to do. it is possible to blow seals, damage internals to affect dampening. bend shock bolts (I am referring to any vehicle by the way).
Old 07-28-2006, 04:07 PM
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and thts why we need aftermarket shocks/struts..


.
Old 08-24-2006, 08:29 AM
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ok, on the eibach springs, inside the package there is a sheet that says to cut the bumpstops. i think its 30mm in the front and 13mm in the rear.
Old 08-24-2006, 10:54 AM
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yeah, its 30 mm in the front and 13 mm in the back

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