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Old 09-15-2010, 08:18 PM   #1
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BC Coilover Install Writeup

Ive never done a writeup before so I figured why not. This was my second time doing a coilover install so I knew what to do and the picture taking wasn't going to eat up much time. Plus for me this is one of the installs that are fun. I also like doing big brake installs too. Heads and headers are a major fail. I hate them. Probably because Ive done it over ten times already and it kills my back. Anyway, here we go.

Open the box and marvel and the goodness. I find it funny how these are packaged EXACTLY the same as the Pedders coilovers. In fact everything in this box is 99% the same and the other red box.



Wipe the drool off your face and get your lucky spring compressors out. This is the funnest part of then install.



Next undo the top nut.



This is the strut top bushing. This bearing comes out and is replaced with the new one that BC provides.



This is the order the the top of the coilover is assembled. Make sure the washers are facing the correct way. There will be a diagram provided with the kit. Probably the only legible part of the instructions. Snug it tight. Doesnt have to be anything crazy.



Enjoy your shiny new coilovers. They will be dirty soon.




To adjust the shock you only have to loosen the bottom nut. DO NOT TOUCH THE NUTS THAT HOLD THE SPRING. These are preset from the factory for a particular pre-load for the spring. Then jack up the arm to get some weight off. You will have to play with this setting until the threaded body can be spun by hand. That is how you adjust height.
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Last edited by Oh4GTO; 09-15-2010 at 10:49 PM.
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Old 09-15-2010, 08:43 PM   #2
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Rear install

Undo the sway bar.



Put a jack under the control arm. Get your breaker bar out and undo the shock bolt. You may need to use some PB blaster depending on where you live.



Peel back the carpeting in the trunk to find this little guy. The passenger side is hidden by the fuel fill line. Its a pain to work on that side. You are going to need to use vice grips to stop the shock from spinning while you undo the nut.



You are going to need to re-use the stock bushings.



This is how they go on the BC strut. Washer and bushing on the bottom and the other on top.



To reinstall to shock at the top you are going to have to use an allen key to stop the shock from spinning. Just snug it up and make sure both sides are relatively the same length.



Remove the original spring using the spring compressor. Put the new BC spring and perch as pictured. I didnt reuse the rubber pancakes that are originally there. The limit how long you can go because the rear on the pedders wouldn't go that low unless I removed the height adjuster nuts. Plus with this kit you get a rubber insulator for the spring.



Jack the arm back up until you get some pressure on the spring and the perch is almost flush with the body.



This is how long the shock was for me. This is because I had put the spring perch on the lowest setting. Loosen up the nut and spin it way up.



Next you are going to have to thread the bottom portion until the mounting eyelet is lined up with the mounting hole in the control arm. Thread the bolt back in and torque it to 75lb/ft.



In order to make height adjustments for the shock you dont have to unbolt it. The threaded body will spin. You just have to jack the control arm to get the weight off the shock and play with it until it becomes easy to turn the threaded body. A good rule of thumb is for ever X you change the spring perch, the shock must be changed by 3X.

Hope this was helpful. Fire away if you have any other questions.

Last edited by Oh4GTO; 09-15-2010 at 08:45 PM.
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Old 09-16-2010, 03:26 AM   #3
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Kind of a quick how to for people that have not done this before. So I have a set of Kollar strut mounts in the closet. Does that mean I don't have to use a spring compressor if I use those??
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Old 09-16-2010, 09:46 AM   #4
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Thats right you wont have to use the spring compressor.
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Old 09-16-2010, 10:56 AM   #5
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what seetings do you have the dampners set too and how would you rate the ride quality
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Old 09-16-2010, 12:55 PM   #6
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I have not driven the car yet. But with the pedders the softest setting provided a very plush ride. It was better than stock shocks and lowered springs.
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Old 09-16-2010, 01:05 PM   #7
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Thank you for this writeup, Oh4GTO. I'm a coilover noob. Interesting that the existing rear springs seem to be reused, but with the addition of height adjustment. Between this and Pete's XA installation videos, any gearhead with reasonable aptitude should be able to install these.


http://www.ls1gto.com/forums/showthread.php?t=327708
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Old 09-17-2010, 07:39 AM   #8
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Quote:
Originally Posted by wango-z-tango...View Post
Thank you for this writeup, Oh4GTO. I'm a coilover noob. Interesting that the existing rear springs seem to be reused, but with the addition of height adjustment. Between this and Pete's XA installation videos, any gearhead with reasonable aptitude should be able to install these.

http://www.youtube.com/watch?v=B8B1oh_mHqA

http://www.ls1gto.com/forums/showthread.php?t=327708

The rear springs are not re-used. The kit comes with new springs and they are completely different than the stock pieces.
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Old 09-19-2010, 08:04 AM   #9
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No camber plates for the front!?!?! WTF mate.
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Old 09-19-2010, 11:05 AM   #10
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can anyone take a couple of measurements for me? What is the length of the BC rear springs and what are the inside diameters of the ends?
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Old 09-19-2010, 11:25 AM   #11
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excellent write up, enjoy them, i had mine slammed the whole time I had them

camber will be way off, I adjusted it myself, the rear wasn't all that bad though
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Old 12-02-2010, 04:04 AM   #12
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I am ordering a set of these.
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Old 12-02-2010, 03:22 PM   #13
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Quote:
Originally Posted by ShelbyGoat...View Post
excellent write up, enjoy them, i had mine slammed the whole time I had them

camber will be way off, I adjusted it myself, the rear wasn't all that bad though

How much did you rub in the front??
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Old 12-02-2010, 05:16 PM   #14
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It there a need for a rear kit if I am running King HD and koni shocks out back already?
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Old 12-02-2010, 05:20 PM   #15
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No need for the rears really. Not really sure how they will work together.
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Old 12-13-2010, 12:31 PM   #16
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Maybe a dumb question, but I ordered a kit from Kollar that came with RR bushings, strut mounts and bump stops. Are bump stops used on a coilover setup??
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Old 12-13-2010, 02:49 PM   #17
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Yes because you don't want the actual shock to bottom out. It will damage it.
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Old 12-13-2010, 03:46 PM   #18
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After reading your write up and watching the Pedders video, where do the bumpstops go?? Forgive my lack of knowledge when it comes to suspension.
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Old 12-13-2010, 04:24 PM   #19
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Ok I think I see why you are confused. The bump stops that you got are for the original shocks. The coilovers have them built in.
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Old 12-13-2010, 05:17 PM   #20
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Ok good. Thanks for clearing that up.
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Old 12-14-2010, 12:35 PM   #21
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rear bump stop is hidden by the little cover.
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Old 12-14-2010, 12:40 PM   #22
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Quote:
Originally Posted by StangSlaya...View Post
How much did you rub in the front??

When i installed the fronts, i did not make any height adjustments. It was slammed and the only rub i got was ever so slightly while pulling into an inclined driveway.





I've since adjusted them about 3/4 inch higher and it has eliminated the rub and improved the comfort.
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Old 12-14-2010, 05:13 PM   #23
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How was the camber with it that low??
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Old 12-15-2010, 11:06 AM   #24
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Quote:
Originally Posted by DocDiggy...View Post
How was the camber with it that low??

used a lovells quad eccentric kit in the rear. Front was fine with just the front just using the camber screws.
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Old 12-31-2010, 02:12 PM   #25
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Excellent job !!
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Old 12-31-2010, 02:48 PM   #26
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nice , good write up.i think thats the only way to go is coilovers ,of course it would be nice to have coilovers in the rear but for the price its a good deal .
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Old 01-15-2011, 05:50 PM   #27
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nice job on the write up. REALLY easy to follow the steps.
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Old 01-15-2011, 09:19 PM   #28
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OP did you have to reuse your top retaining plate nut?
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Old 01-16-2011, 07:39 AM   #29
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Yes you reuse it.
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Old 01-25-2011, 12:31 AM   #30
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How and where do you adjust the dampening?
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