I Finally Lowered my 340i! - H&R Sport Spring DIY

[@kern417]

I recommend doing Sway Bars first. Here's why: kzbin.info/www/bejne/foGoYaOOfdpgg6M

[@justindaniel5959]

Best install video so far, shock was still in its hub assembly! 👍

[@spike6385]

Thank you for making your content the way you do - it helps give confidence to us other autistic automotive nerds of us also wrenching in our garages!

[@sphinxore4499]

You make it seem so easy, I’m sure the day I try this I’ll have the car on jack stands all week

[@Luc10011]

If you have all the tools, it should be pretty managable. I did suspension on E90, which is basically the same and got done in one day.

[@kern417]

get an impact wrench just in case you get a stubborn bolt

[@george4111]

Just was about to do this thank you 🙏

[@Unknownbeast703]

Beautiful setup 👌

[@WatchesAndCars]

What's the part number for the bolts you mentioned in the video? The 7 bolts on top of the suspension, and the 2 in the rear?

[@dhbamby]

Great content @kern417, really using your videos alot with my new M240i F22. thank you, subbed

[@j.f.4765]

Did you tighten the main spring strut bolt after you torque the mounting bolts on the strut? On the video, it didn't seem tightened when you put the front shocks back on the car..

[@michaelray316]

How low did you drop it, I’m thinking about doing the same 🙏🏾❤️✅

[@cicliolmo7152]

nice stance. how much additional drop (if any) would you say you got when the springs finally settled ?

[@kw7570]

Anyone using DINAN springs? My RWD 340 needs new shocks/struts. I'm going with Bilstein. I want to change the springs as well, but want a very moderate drop. I also see 034 springs available. Let me know if anyone used DINAN springs, or 034, and if they have a minimal drop - thank you

[@battleforfairlife7834]

Hey man thanks it’s very helpful, what rims are they like name and dimensions ( wheels you put after changing springs) ? And is that the 30 mm lowering ?

[@westonkeit5031]

How much did it actually lower? I am getting ready to replace my coils, but only want a slight modification look. How much is the modest drop?

[@maximusaxe]

Same headlight adjustment on adaptive cars? I have adaptive LED’s on my F30 and they’re pointed a bit too low

[@kern417]

yep

[@tamcra5357]

Great vid! I have a question, So BMW’s with M-Adaptive Suspension a lot of people online were saying that running springs would wear out the shocks. Would the safer play to buy coilovers that support M-Adaptive Suspension or would spring be a safe play?

[@B58Cwoissant_]

IMO you already have great suspension with the adaptive. Springs will be good enough. Suggest you do some research first on the forums

[@NS416]

No Coilover will support the M adaptive suspension, since it’ll be replacing the whole system. You’ll need to code the adaptive suspension out once you install the Coilovers. Unfortunately the springs will wear out the shocks. I installed it on my last F30 which had about 20,000miles on it, but 45,000km the shocks were worn.

[@kern417]

springs work great in my experience. i'll give a long term review as i get more miles on them but i've never had shocks fail prematurely due to lowering springs.

[@Nick-ds3sp]

@kern417 would you be worried with lowering springs would put extra wear on your shocks? If this is even true? I have EDC and am trying to avoid purchasing $3,000 coilovers that support EDC without the delete kit. I am curious to know your thoughts. As I want the cosmetic of the lowered car, and the small performance gains

[@kern417]

I am not worried

[@ross1024]

Are you scraping on entry/exit/speed bumps? I have the dinan springs and already scraping with the mapper front lip. I’d like to go lower up front to get rid of the gap

[@kern417]

Nope

[@markdellebovi5171]

What are your thoughts about re-using to torque to yield bolts vs replacing them? I see a lot of mixed things on this. I believe all of the top suspension bolts should be replaced. Did you re-use or replace yours?

[@huh0123]

Torque to yield bolts, or "stretch bolts" as some call it should NEVER be reused. They are made to stretch when torqued and should be replaced because of said stretching. Bolts are cheap, your suspension coming apart will not be cheap.

[@kern417]

I reuse them all the time. Just depends on the application. But if you watch the video you'll see i have camber plates so they are not the stock bolts.

[@marvinzhang3734]

Do I have to change the shock as well? I heard the shock might wear out after changing the shorter spring with stock shocks. Stock 340 suspension is soft Af 😂 I have one and the body roll destroyed my tire’s sidewall

[@kern417]

I recommend getting sway bars if you want to fix body roll

[@marvinzhang3734]

@@kern417 h&r sway bar installed (front on soft setting) and it understeer a lot any suggestions to reduce that?

[@kern417]

@@marvinzhang3734 should do front and rear together. Then adjust camber to dial in neutral handling

[@tbbmw_m240i]

Thanks for the video! How many mm did HR say the car should drop? Thanks! Big up from Czech Repubic in Europe! :)

[@kern417]

1.3in Front and 0.7in rear So that would be about 33mm front and 18mm rear

[@shweatycardboards8954]

Since you do track, what made you choose lowering springs over coilovers? Unless this is a sponsered video then it's understandable 😅

[@kern417]

they are a sponsor but also because i am daily driving the car and i didn't want to give up the adaptive suspension

[@shweatycardboards8954]

@@kern417 have you considered mss adjustable springs? I feel these are the happy medium between lowering springs and coilovers.

[@kern417]

yes but these work fine for my goals

[@jaro8830]

How much should i lower my 340i? its an xdrive f31. I want it to be slick in the arches and tires. I dont want it to look a slammed camry haha. I see so many diffrent setups and no one mentions how much they have lowered their cars. Im running 19inch wheels

[@marcusskarland1155]

I also have an f31 340 xdrive and the hr makes it look very good, the ride is awful tho. Highly recommend a full coilover setup for better feel and a nicer ride :)

[@kern417]

just depends on your personal preference. you can't control the drop with springs, but you can see in the pictures how much it lowered my car.

[@f32440i]

Those shock tower bolts are 1 use only from the factory

[@kern417]

Those are aftermarket camber plates and hardware my guy

[@wnnrscrclbrnd]

You made that front strut look easy… I was going to consider coilovers bc I figured the fronts was gonna be a pain?!?

[@NS416]

Just do Coilovers if possible, I did Springs on both my 328i & 235i. They ride rough overtime and just have the car feel bouncy. 440i has coils the most basic ones. The springs were always a pain to install.

[@ross1024]

After doing koni struts and dinan springs on mine I wish I would have just done coilovers from the get go

[@kern417]

it's a lot easier when you don't try to remove everything, so this is how i've been doing it the past several years.

[@Reaper_f30]

​@@kern417im going to do my front tomorrow i believe your leaing the strut out approach will save a great deal of time and stress undoing less bolts essential I did the rear the other day following your guid great stuff man

[@CamjProductions]

Looking to buy 340i in the next couple months, been looking for over a year. What tools do you recommend I get for garage work?

[@kern417]

socket set, torx, etorx

[@CamjProductions]

@@kern417 you’re the man bro. Love how your vids are so educational too, appreciate it!!

[@aidangarrett7295]

I have an xDrive 340i with the adjustamble dampers. Is there any coding that I need to do after an install like this? I feel like I've heard about people needing to code ride height sensors or something like that.

[@AMS611]

Manual adjustment @ 12:02 Far as I know no coding needed unless you go to a setup w/o adjustable dampers

[@aidangarrett7295]

@@AMS611that adjustment is for the headlights, not for the dampers. But I see what you're saying

[@kern417]

no coding needed.

[@Marcusgotkicks]

Hey! I need your help trying to get this chassis stabilization code out! Code is : 11C004 Mods: DS1 HPFP, Stock LPFP, Catless DP, CTS intake, BM3 stage 2 91. Car can drive but starts to stutter intermittently in very short durations. No leaks at all around the hpfp lines as well.

[@kern417]

think i responded to your dm but check the wiring going to your hpfp

[@kevin-jm3qb]

I have h&r springs for the supra. But I'm a bit conserned with the massive front drop. Instead of selling them. Any thing we can do to raise the front a bit?

[@kern417]

Unfortunately, no. With springs, what you get is what you get.

[@esteokahmed9969]

Does anyone know if xdrive cars will be able to push down the front control arm to get the strut out?

[@thematrix1701]

Yes I just did mine today only thing is the front axles will come out and you have to rotate the rotor and push down on the strut and in. It’s best with 2 people

[@esteokahmed9969]

@@thematrix1701 I did mine 4 days ago and I was stuck on the axle part for a whole day and next day I figured out that my axle was popped out and everything went in like butter after that

[@thematrix1701]

I just did this with same springs as well and is it normal to have the driver side sit a tad bit higher than passenger side?

[@kern417]

a lot of people experience that yes. stock suspension should have been similar.

[@vollcare4076]

What did H&R tell you is the spring rates of these sport springs ?

[@kern417]

No spring rates were provided, sorry

[@Bubbleman2k]

Hi Kern, what transmission do you have in your car with the big turbo? Any issues with it?

[@kern417]

the 440i has a manual transmission. so far, so good.

[@thegamingleo7503]

Did you have alignment issues after this

[@kern417]

yes, you must get an alignment after lowering to square everything up

[@taransingh3201]

Curious, what is your current tire/wheel setup

[@kern417]

i daily stock wheels and run my apex setup for track days. kzbin.info/www/bejne/mKXalqdmmaxmb68

[@DanielScariti]

Do the sport springs work well with the standard suspension shocks and struts? I heard they may wear faster.

[@masonkendall5984]

They will some ppl buy new shocks and pair it with springs depending on how old it is j get bump stops and u should be good if ur under 50,000 ish on chassis

[@kern417]

yes it works great.

[@1_luismm]

I have heard a lot of plp complain about lowering springs will give you a harsher ride is it true or barely noticeable?

[@masonkendall5984]

Depends on what u get sport springs super sports will bounce u a lot i have Dinan springs and they are great w paied bump stops

[@Woodlands1]

i have sports on atm and its a little bouncier than stock but it doesnt bother me

[@ross1024]

I have dinan springs on koni adjustables, definitely firmer but not bouncy, only thing I don’t like is the drop on an xdrive car the front gap is bigger than the rear. I already scrape my lip on some curbs so not sure if I would go much lower anyway

[@kern417]

review coming saturday

[@boostleak4704]

what spring would you recommend for an xdrive car i know going to low can bind the axels

[@kern417]

H&R sport springs, same ones i got

[@boostleak4704]

@@kern417 thank you I know that was I dumb question as I saw your front axels thank you for the reply :)

[@kern417]

No problemo

[@vollcare4076]

Check Eibach pro-kit, it’s not as low as these H&R

[@mull54]

Do you recommend buying new bolts or can I reuse them?

[@kern417]

The manual says replace but I've reused mine a few times without issue. If it's your first time dropping your suspension it's probably fine.

[@mull54]

@@kern417 Great thanks! Its my first time. Where do you get the torque spec for everything?

[@kern417]

bmw manual

[@ThatguyWitjokes]

How much are you paying for your track days?

[@kern417]

lately around $500 for a full weekend. prices have gone up the past few years.

[@ThatguyWitjokes]

@@kern417 My local track is charging 1k for a one day experience. Sucks

[@kern417]

@@ThatguyWitjokes 😳 check MotorsportReg to see if any groups rent it out for a weekend at a cheaper rate. $1k is crazy

[@ThatguyWitjokes]

@@kern417 Great idea thanks man and keep pushing the platform as you are 🤙🏽

[@coenwag]

Kern, sorry but for springs H&R are really bad. These springs keep sagging. Specially on the standard Adaptives shocks. I fitted these myself on my M140i 1.5 year ago. I was soo much that end the end the car stood on its bumpstops, with the rod completely at the end in the damper strut. No bueno!! I swapped to Bilstein B8 and Eibach Pro Kit Sprigns. Match made in heaven. I do have HR sway bars and these are good.

[@kern417]

they've worked great for me. this isnt' the first car i've ran them on.

[@coenwag]

@@kern417 happy for you they work great! :)

[@timh1142]

@coenwag, I’ve just installed a relatively similar setup on my f22 M240i with Bilstein B8 and Dinan springs but the front sits much higher than the rear it looks ridiculous now and I am very disappointed at how it currently sits. I’ve been thinking about either going with the H&R super sport springs or Eibach Pro and stumbled upon your comment. How are the Eibach springs when paired with the B8 shocks? Would you happen to have any pictures on your setup now? TIA.

[@orinoko77]

​@timh1142 I've had B8 plus Eibach on my 435i. Eibach Pro Kit lowers a bit less then H&R Sports, but I hear they are also a bit more comfortabele so for visuals vs comfort keep that in mind. The B8 Bilsteins front shocks have a different spring plate compared to stock where the lower part of the spring rests on it makes the springs sit differently, so a B8 with a lowering spring will still sit differently to a stock shock with the same spring is what I'm trying to say. B8 plus Eibach Pro Kit lowers mostly the front on the car by 20 mm and the rear maybe 5mm the handling is alot better tho less roll and better turn in and stability. The only thing I disliked a tad about the dampers is the initial first unevenness in the road they handle a bit harsher and then have a smooth roll off /control for what ever comes next. It appears Koni Yellow has a smoother first response from what I hear. That being said I enjoyed the B8's plus Eibachs alot and will transfer then to my 340i rwd Touring at some point😉

[@Yruh4688]

For people with adaptive suspension do lowering springs mess with that

[@BadBrother22]

There is a Dinan kit for adaptive guys. I am looking at that one as I'm in that boat.

[@kern417]

It does not mess with adaptive suspension

[@sergiodelgadillo5090]

H&R springs give it too much of a drop wearing the shocks way faster don't you think?

[@kern417]

Nope

[@raldyjimenez3319]

Hmmmm H&R is too stiff

[@kern417]

works great for me

[@petersheehan7520]

I’ve had them on my 340 for a year now,i have the adaptive suspension,bit wobbly in Comfort,but spot on in sport+ which i drive in,after a geo set up they feel great for “fast road”