How to Setup Adjustable Coilovers & Control Arms // MacPherson & Divorced

After upgrading from your factory suspension, there is a bit of setup to ensure that you’re squeezing every bit of performance. Coilovers have a bunch of different parameters that can be changed to optimize the driving experience, regardless of how low you set the ride height, and the same thing goes for your control arms. In this video, I will be going over the initial setup on my FB6 Honda Civic Si, in addition to all of the adjustments that should be made prior to going to your alignment shop.
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After you perform the preload and initial ride height adjustment, you can then use the 4 corner scales to get the best suspension setup possible, as the left and right sides of the car will be approximately the same weight. That will allow the car to behave in a much more predictable manner.
If this video has helped you out, please help me out by liking the video 👍🏼 and stay staying up to date with my 👇🏼
🎥 KZbin Channel - bit.ly/2YBd5nf
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If you have any additional questions, feel free to send me an email at [e-mail]. Be sure to tag me on instagram @milmast with your projects. Thank you so much for watching!!
Video Chapters
(0:00) Introduction
(0:37) Strut Preload Adjustment
(3:26) Strut Ride Height Adjustment
(5:12) Divorced Ride Height Adjustment
(6:49) Divorced Damper / Shock Absorber Adjustment
(7:38) Motion Ratios Explained
(8:10) Divorced Preload Adjustment
(9:59) Damping Adjustment
(11:58) Alignment Time
(12:34) Caster Adjustment
(13:48) Front Camber Adjustment
(14:39) Installing SPC Camber Bolts
(16:44) Rear Camber Adjustment
(17:46) Spherical Bearing Adjustments
(18:03) Measuring Camber Adjustments
(18:47) Toe Adjustments
(19:46) Front Toe Adjustments
(20:18) Rear Toe Adjustments
(20:51) Alignment Remarks
(21:42) Is Your Alignment Out of Spec?
(22:16) Final Remarks

[@SohailMahboob-US]

Don't remember how many times I have watched this. So properly made video

[@snizzard9730]

Literally THE best explanation of adjusting these coilovers. Your explanations have made me confident that the clunking sound im getting is likely from an offset preload.

[@romper4444]

I gotta tell ya man, as a 25yr mechanic, you have the most detailed instructional videos ive ever seen on youtube. You explain things in the same way i explain things to young apprentices so that they understand it right the first time. Never skipping over anything, and knowing all the small details that need to be pointed out is so key to learning. Well done brother!

[@manueldeleon6115]

Man I appreciate you taking the time and the effort to explain all this! I paid so much attention that I can't actually believe it. I came here just to understand more about preload on divorced suspensions and ended up watching the whole clip. Thanks, you have cleared all my doubts!

[@kickingitwithkohjay.9099]

Thanks for this video, very helpful. I have watched many of your videos on the 370z and after months of collecting parts and finally getting them on the car, I have to say thank you. Your videos have helped me out tremendously. I'm super stoked that my ride is set perfect and feeling good. loving my new coilovers. Much appreciated.

[@jherveycensey5993]

I have not seen a better in-depth explanation for Coilover setup thanks bro

[@TrenMonster]

You don't know how useful this video was saved me so much, first time doing anything like this and completely messed up installing the rear but hopefully now we are chilling

[@RebelD22]

Seriously one of the simplest and best explained coil over set up videos ever. Thank you

[@joaquinberds]

been watching you since I was young, learning how to drive manual, rev matching and double clutching. And now its come full circle with me watching your videos learning how to mod my car hahah. we’ve come a long way, i’m happy you still make videos, they are as insightful as ever

[@milanmastracci]

That's awesome Joaquin!! Happy to hear you're learning to upgrade your car 🙌

[@user-jv8pq1yr6o]

VERY DETAILED, couldn't ask for a more in-depth tutorial, thank you !

[@1989marcomendez]

Best explanation ever, i was having trouble understading pre load and rear divorce coils

[@SohailMahboob-US]

Now that's what I called a very properly made tutorial. Congratulations and thanks

[@ALIIEF_THOMAS]

After owning a civic for 4 years 😂🔥 ur the goat I can finally diy my rear TOE now cause u showed me wat to adjust

[@babypluto3746]

Just wanna say that I installed bc’s on my 2008 accord coupe and you’re video was very helpful and informative. Thank you so much, seriously.

[@milanmastracci]

I'm happy to hear that my video was helpful to you brother! Cheers

[@j.brubaker2717]

This is the coilover / control arm setup for dummies. Excellently done.

[@Petrolheadaholic]

You're so helpful to explining every single aspect for a perfect setup

[@Moby41]

Your workshop has gotten quite the upgrade since I last tuned in (like 5 years ago) Happy to see you're doing well for yourself 👍

[@milanmastracci]

Thank you very much! Welcome back man 👊

[@LL-se1vj]

Idem

[@SLOK20C2]

@@milanmastraccihonestly, it’s quite impressive. I originally watched years ago on the 9th gen civic si, bc I had just gotten one and wanted to know everything haha. Now I’m modifying a focus st, and im at the coilovers. I thought to myself, “I wonder if he still makes videos..” haha the answer is yes.

[@jonnypiper5378]

Yeah I love this guy compared to other people his voice is pleasant and he explains everything so good and knows how to explain it very knowledgeable man

[@intuitivecat]

Thank you. This is the first video i’ve found that shows hoe to properly adjust the rear damper/shock.

[@BigMike86]

Dude thank u so much for not only this video but all the videos you have done you have made it so much easier for DIY people like myself to do exactly that

[@milanmastracci]

Glad I could help!! Feel free to share it with your buddies too so they find this help 🤙

[@kevenojeda2009]

If I would have watched a couple seconds more I would have known why my car was 1/4" higher than I was aiming for. Thank you for this video. Always very detailed explanations. Keep up the good work. 👏🏼

[@milanmastracci]

Glad it helped! Cheers Keven 👊

[@181suydam]

Just purchased a car with coilovers, your explanation was easy to understand and very helpful! Great Video!

[@Tekno242]

Awesome video.. I have had a very difficult time trying to find a video on how to adjust ride height for a divorced setup. Thanks so much

[@jeanbaptisteignaceberrouet4073]

Best video ever for someone who does not know much about cars.

[@CasperTheGasser]

This is by far the help I been needing, thanks for sharing your skills brother 🙏

[@williambrandon9660]

Thank you so much man. Super helpful and clear information. Getting under my genesis coupe tonight to play with the ride and stance. She's my daily race car so I'm going for a tire efficient aggressive with sporty height. Your simple clear explanation and example gave me the confidence to say eff it and go for it. Best friend and music collaborator gonna create some good times off this. Thanks again Deffffffinitely subbed

[@Fb6.Nan0]

Your a life saver!!! God bless you and keep doing what your doing!

[@milanmastracci]

Glad to help!!

[@miguelcaraballodiaz9967]

I got the same year and model in black with the BC BR model coilovers. I appreciate all the videos you have made on your car! Love the detail and dedication!!! Helped me a lot knowing all these things. Keep up the good work 💪🏼

[@milanmastracci]

Happy to hear that Miguel! Feel free to shares the videos too so I can bring more good content for ya 👊

[@cooldudeeaful]

finally ive found a vid that explains how to adjust these types of coils, ur the man fr bro

[@milanmastracci]

Glad I could help Erik!! I know setting up the rear suspension is going to help a ton of people!

[@dragon148567]

You explain it very easily. Thank you!

[@Paulnunz_]

Best video on adjusting coilovers👌🏼

[@SuicidalKittenss]

Easily the most helpful video you can find on this topic. Thank you so much! I was afraid I blew my front coilovers but turns out my preload was just wrong.

[@milanmastracci]

Glad it helped!

[@ViggenStory]

This video is goated. Best explanation ever. Thank you man

[@BrianGonzalez-wp1iz]

Man this is amazing like always just seeing these videos really help me out and understand more about my car sounds kinda selfish but I like knowing I have have a guide from someone else good work man🔥

[@milanmastracci]

Thanks Brian! I appreciate it 👍 I'm happy to help! Oh I know exactly what you mean, that's not selfish at all.

[@reycruz116]

Dude thanks for making this vid,i just recently upgraded to raceland coilovers on my 2011 Genises Hyundai coupe 3.8 r spec and i installed them my self which wasn't the best thing but thanks to you i was able to get it done thamk you keep up these vidoes for guys like us.

[@milanmastracci]

Happy to help brother!! Cheers 👊

[@Red-ev8ls]

Words can not describe how informative this video was for me I’m 19 with a stances Honda civic 2011 but this has made me understand so much more of my car thank you so much this work is unmatched 🙏🏿

[@bluegill2030]

Great job on this. I just got some coil overs for my mustang, I want to raise the suspension and this helps to understand how to get it done.

[@Theopalsource]

Very professional and informative video, keep it up 👍🏼

[@ecxeric]

the instruction is very clear and detailed!

[@narsisoambriz6100]

Thank you 🙏🏽 this was the best explanation on how to adjust my coil overs !

[@milanmastracci]

You're very welcome!

[@gemini_beck7520]

Thank you so much for the clear in depth explanation 👏🏽

[@milanmastracci]

Happy to hear you enjoyed it! Feel free to to share the video 👊

[@eshaneardly283]

man i want that z back on the channel. highkey you got the best tutorials and part installations for the z platform

[@milanmastracci]

Oh man I'm going to have one back not he channel! Rest assured 🤙

[@motox947]

great video, fantastic explanation of setting the ride height and preload. unfortunately now i have to go reinstall my rear suspension. but now it'll be done right! thanks!

[@milanmastracci]

You can do it! Good luck

[@callum5879]

thnks man. this really help me. imma make som well needed adjustments to mines tomorrow. bless

[@kseries20-24only]

Dude, thanks so much for making this video and being a great teacher! I've struggled with some of these concepts, so it really helped! Now I just need to find those little coilover adjustment tools as the 2 cars I've purchased came with some coilover, but no tool to adjust :/

[@bastro3320]

Bro thank you finally a great video explaining front preload and divorced preload, my ride has been really clunky and rattle the last two weeks after pedders install, gonna try this for my 4th time adjusting preload, thank you!

[@sashaghovanlou8175]

how did it go?

[@bastro3320]

@@sashaghovanlou8175 I had to readjust the preload I had it very loose once I got it right it felt dialed in

[@Nishimachi_Photography]

Very useful video. I found this because I searched how to adjust the preload because the inner rear wheel has been spinning too much in tight corners. So I'm hoping this makes a difference to the performance of my Skyline.

[@steveguest8028]

This is a great video and very well explained 👍

[@uchiha_d1334]

Best coilover explanation video on KZbin.

[@Josiah-X]

Thanks for making this video. This is very visually informative. 👌🏿😎🌴🌙 Now, all you need is a front strut bar to reinforce the stability.

[@RandyWicks]

That is a great video. Very clear and well done

[@milanmastracci]

Glad it was helpful!

[@johnchu210]

Not that it matters to me of how adjusting the vehicle. But I just curious of things and thirst for knowledge. The way you explain and demonstrate very well even though I never had Coil Overs, I feel very confident to get one. Subscribed.

[@milanmastracci]

That's awesome to hear John! Thanks for your feedback 👊

[@madmike5144]

Thanks for this info, need to check/do this to my car

[@stevemount]

This is the best explanation of how to adjust this that I have ever seen, thank you so much for finally making this 100% understandable! I feel like I can adjust the suspension on this vehicle I recently purchased with coilovers just like this already installed.

[@rx7cl]

Nicely done ✅... Man.... I'm impressed 👍.

[@Damnjayy1347]

Bro I been looking forever and ever on how to do my coilovers and was upset with myself thinking I got the wrong ones bc I couldn’t understand it. Thank you.

[@milanmastracci]

Happy to help brother! 👊

[@avenida1903]

Thank you for share this with us 😎 ! In my personal opinion i really prefer the old school suspension that Honda what did use before coilovers front and rear without the spring in the rear easy and simple !

[@milanmastracci]

You and me both! It's insane how many different rear suspension designs there are, and how some are easier to work on than others! Ideally, multilink rear would be nice for these cars, especially since it would eliminate the heavy steel trailing arm, but oh well lol

[@erickmarte5294]

MONTHS, I have been looking for months for someone that could explain how to properly set spring preload. I appreciate you so much dude. I’m definitely gonna binge your channel after subscribing.

[@milanmastracci]

Glad it was helpful! Welcome to the channel 👊

[@MakeItCount-wk7xj]

Very informative bro thx im installing some coil overs n divorce set up on my 2000 gt mustang

[@meerkhan4404]

Very well explained

[@MrSupernova111]

A masterclass. Thanks!

[@milanmastracci]

Glad you enjoyed it!

[@hyatt-reaction8258]

He’s back ,, thank you 🙏

[@milanmastracci]

Back at it buddy!!

[@Destroyer369]

If you continue like this you’ll be without customers soon you’re the best

[@martydastooge]

Awesome job mate.. now I feel comfortable to tackle the rears. I was rubbing like a mofo 🙄. Thanks!

[@nizmo90]

Thanks for the great . about to get some coilovers for my 18 maxima

[@zamo_curryfb6218]

A-1 video my guy 👏🏾🔥

[@thmanx]

My friend you hit every “Do It Right” nail on its head sir. Well said, edited, and done. I’m about to install a BR series with Swift springs on my 16 ILX. First owner and 8 years old and it’s time for her upgrade. Been well versed in my older 00 civics generation of suspension. And this video really helped sort out my confusion about preload and height adjustment on divorced rear systems.

[@user-gy2ss8lw9b]

Just a heads up, you adjust ride height with spring and the base is for tuning bump/rebound travel. This applies to both coil over & divorced designs. If you adjust height at the base you'll have the wheel colliding with the body work. You use it to set a limit for bump travel. If your spring is loose at your desired ride height, that's what helper springs are for. Spring pre-load is not a thing, just an outcome of height settings.

[@johnkopp1486]

This is the most informative comment I've found between Google and KZbin. I figured helper springs would be the cure, but nothing told me I need them... Thanks.

[@blackzacc]

So I should have the lower locking but all the way a the bottom and adjust the locking nuts under the spring for ride height?

[@seethruhead7119]

this is correct, i just made a comment saying the same

[@LosDaGhost973]

Man I'm so freaking lost

[@ThatRedNismo]

My guy Milan I am in love with you, you literally commented on my post last night about being confused with this

[@milanmastracci]

Happy to help brother!! 🙌

[@dexbone_]

Nice video i appreciate the 9th Gen content

[@grahambond7496]

Good explanations. Also like The divorce approach to Ride height. No need for 2 car jacks

[@angelmerino19]

Agree with everything you said except for the rear toe adjustment, it’s actually adjusted on the rearward nuts on the trailing arm where the knuckle attaches, the 17mm and 24mm nuts that are on top of each other is where the factory adjustment point is for rear toe. Otherwise very informative, will be using your tips when installing my coilovers.

[@milanmastracci]

Hey Angel, right you are!! I forgot to mention that area too. You can dial in the toe from both spots, first from the knuckle area, and if you need more or less, the entire trailing arm can be repositioned.

[@nedajuh]

You just saved my life bro

[@milanmastracci]

LOL happy to hear man! 👊

[@YoungGearHeads]

Nice whip 🙌🏻

[@milanmastracci]

Thanks brother! 👊

[@charlesnavarro9280]

Great step-by-step instruction. Love it. I just have a question though on the rear 'divorced' set up. My car's rear height won't go up, no matter how much adjustments I make. Is it safe to say that the spring rate is too soft? Coilover is bnew, and I'm worried that I might be putting some stress on the rear shock because the car's too heavy for the spring

[@Younotus455]

Love the video!. Wish you went more in depth about adjusting the upper camber Plate.

[@Dnasty1]

Great video did you upgrade your garage setup? Looks great. Was wondering what that rubber sleeve was for around the coils. I have bcs as well and am getting some spring noise or binding.

[@stinkbra]

Each to their own but I've always used shock body to dictate bump stop engagement, then spring perch (preload) to adjust compression travel vs rebound travel. -Adjusting ride height using shock body adjustment only is a good way to get the tyre to collide with body work. -Adjusting spring perch to a generic 5mm is a good way to either not have enough compression travel (no grip), or not have enough rebound travel (no grip) depending on spring stiffness.

[@garyy3758]

Thanks for sharing. Do you get any knocking noise with the BC camber top type ?

[@GilbrianLopez125]

Thanks for this!! I buy my first Coilovers and this info is very important for me. Now I have to make sure everything is gonna be ok when I put them on the car. If I have a question I will let you know so maybe you could help me, thanks 🙏🏽🙌🏾

[@milanmastracci]

Glad it helped!

[@GilbrianLopez125]

@@milanmastracci can you give more details on how to adjust the rear suspension.

[@GilbrianLopez125]

@@milanmastracci how can we adjust the links that can be adjustable?

[@milanmastracci]

@@GilbrianLopez125 The end links on these cars are not adjustable. You can install aftermarket ones however.

[@SofaKingNYce]

Love the videos. When are you coming back with more 9th gen Civic content? It’s been a while.

[@gateworm2903]

Hey @milanmastracci - Question in regards to adjusting the rear divorced setup, so after changing the spring for ride height, I see some people undo the bottom bolt that holds the shock and spin it that way to align it with the control arm hole again, whereas you just undid the collar and spun it whilst it's bolted on. Do both ways achieve the same thing? I am thinking your way is much easier and no need to re-bolt things.

[@waynestefinashen239]

Milan Merry Christmas and Happy New Year from Jake and i at Eliminator Performance hope you got your snowblower in good running condition with all this drifting snow we are getting here in Port Colborne. Our neighbour just finished shovelling out his side door entry drift that was 7 feet high luck he could get out of his entry door.

[@milanmastracci]

Merry Christmas and happy new years to you guys too! Yes thank you guys for the help. I was able to band air the shift fork for the mean time. I had a good 4 feet in front of my main entrance, and about 5 feet in front of my garage doors. Wasn't fun to clear lol

[@sefarian9355]

👍 thanks

[@jesusaguilar1132]

Sorry for the question, I’m learning. Why did you remove that screw from the shock absorber instead of adjusting the height directly from the coilover body? Thanks for answering

[@TBGSX-R]

Question, the arm to subframe mount points… do you loosen then tighten them with the cars weight on all 4 wheels to prevent bushings tearing or do you keep it loose and tighten it when fully extended with no weight ? Just replaced most of the bushes on my car and don’t want them wearing out quicker to to un necessary stress

[@garnott1887]

Hey Milan 👋 Great job explaining camber, caster, and toe in easy to understand terms. I appreciate you showing how the parts you added contribute to the overall suspension geometry as well. The new wheel and tire combo looks great too! Especially seeing it at ride height at 4:50 🤤 What wheels and tires are they, and could you share the sizes and specs? You keep giving me more and more ideas for my ninth gen, haha! 😆

[@milanmastracci]

Thanks man! I'm happy to hear that 👊 They're Enkei TS-10s in a 17x8+45s, with a 245/40R17 Bridgestone RE71Rs on all 4 corners. I'm a bit fan of wheels that are a multiple of the lug nuts. (5 lug nuts = 5, 10 or 15 spoke wheels)

[@garnott1887]

Thank you too, man! 👊 There’s so many options out there for wheels and tires it can get paralyzing, lol 😆 The Acura 5 spokes you had on there before make even more sense now too. Looking forward to seeing how the TS-10s and Bridgestones perform in future videos, and wishing you and yours a Merry Christmas and a very Happy New Year!

[@KirkyBoy]

information overload man.

[@kevinmace1654]

@5:20 is the spring adjustment always on top or can it be place on the bottom lower control arm?

[@Marky_Markster]

What is the torque spec on the big bolt on the rear shock absorber? Thank you for what might be the most helpful instructional video on coilover adjustments on all of youtube.

[@k20ee96]

Unfortunately most people (and most cheap coil over manufactures them selves) don't know how to set up these types of coilovers properly. The required bump/droop ratio (2/3 bump to 1/3 droop is usually a good guideline) should be set by first installing the coilovers on the car with no springs fitted. Adjust the coil over in the damper body so the piston is at the correct point for the desired ratio at the desired ride height. You can fit the wheels and fully compress the suspension at this point to check clearance. If all is well, refit the springs and use the spring "preload" to bring the damper piston back to the required point determined above (set the ride height). Doing this allows you to set the height without altering the bump/droop ratio like you are doing when you adjust the height with the lower damper body in the video. You're either taking away bump or droop doing it as you are. You may find you need a helper spring if the spring now separates from the seat at full droop. Don't worry about using preload to adjust height either, it makes no difference how much preload the spring has once the weight of the car is compressing it, it will be the same length (as long as it's the more common linear spring type rather than progressive). Suspension Secrets website have some great articles about this on their website, it takes a bit of setting up but is absolutely worth it to get the most out of your coilovers. Usually the higher end brands like KW/NITRON etc use single body dampers so none of this is required, they set the bump/droop for you and only adjust height via the spring perch. These dual body designs are just used for cheapness so they can carry the design over to other models, but for that reason setting them up as above is pretty important.

[@daokochan6245]

This is correct. Blows my mind how much misinformation is out there on this and continues to be repeated. What hes doing DOES achieve what most people are buying coils want and thats to just lower a car. I'd wager most dont know any better, may just not care about doing it this way, or will never use the shock in a situation where you want full use of the shock travel.

[@k20ee96]

@@daokochan6245 the shocking part is that 90% of coilover manufacturers don't even tell you this. Maybe they think it's too complicated for the average buyer but it makes such a difference getting maximum travel out of the coilovers

[@sashaghovanlou8175]

@@k20ee96 Yea most Coilover instructions definitely tell you to adjust height the way this guy is doing it. Kinda wild.

[@juanvalencia1415]

great video Milan thank you, i noticed that you linked the 06-11 skunk 2 camber arms but i did some research and they make the arms for the 12-15 as well, do the 8th gen arms really work on the 9th gen?

[@milanmastracci]

Hey Juan, from my understanding, they're identical between the 8th and 9th gens

[@CallMeMcLovin69]

Ayo are those TS10s? I have the same ones on my si. You’re the only other person I’ve seen with them

[@milanmastracci]

They are!!!! Quite uncommon

[@jos3333]

When adjusting ride height in the rear, making the spring longer makes the car lower or compressing it shorter makes the car lower? Hope that makes sense

[@donmac5124]

Where does the 5 mm number come from when adjusting the preload for the rear spring and shock absorber? I get the 160 number but why are you subtracting 5 from it?

[@jessanthonypatasin7410]

Hey just a question. Can i adjust the shocks without unbolting them? Thanks.

[@NikkoAlgenio-hv2te]

Just a question why the others when adjusting the lowering of the Devorce suspension is only the spring and not the Strut, it was said in the video that when you adjust the spring, you also need to adjust the Strut

[@ghostpimp]

So adjusting the rear dampening; left is soft & right is stiff?

[@speedybroski4575]

Nice video , I have the same coilover on a x5, but the rear tires are robbing with the fender when im driving and go over highway imperfections, should I raise the rear or should i just put more pressure to avoid too much damper in the rear? Thanks

[@HafroSamurai]

Honestly, I'd just ditch the way that so many people and manufacturers get wrong. What I mean is that...... A) The lower spring perch is actually what should be adjusted for ride height. B) The lonesome lower locking collar is actually what should be adjusted to dial in shock travel. C) You are likely rubbing because you haven't set your shock height to hit your bump stops before your tire rubs. There are some really good videos that cover how to do this. I'm still learning and far from an expert but I can tell that well over half the content on here on coilovers is incorrect. Mike Kojima with MotoIQ is phenomenal and explains a really easy way to adjust your dampers once you dial in your ride height. Also, depending on your desired ride height you may have to switch to different springs. I should mention that you of course can shorten your shock length but know that I'm doing so you are sacrificing shock travel. Hope this helps you in some way. I've been trying to dial in my godspeed/bracing/custom coilovers for the past 1.5 years with limited info/resources for my car. Good gods has it been an adventure and will eventually post my experiences on a couple forums in the future.

[@antonescobar954]

whats up bro? i have question , everytime i adjust the ride height. do i need an alignment? thanks

[@kennylee2860]

How to adjust the rear ride height at the rear ? By adjusting the spring thread or shock thread?