Go Back   Club Lexus Forums > Lexus Model Forums > GS Models > GS - Fourth Generation > Suspension
Sign in using an external account
Register Forgot Password?

DIY Guide: 2014 GS350 F-Sport Lowering Spring Install Guide

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 03-30-14, 01:45 AM   #1
JeffTsai
Lexus Fanatic
Trader Score: (1)
 
JeffTsai's Avatar
 
Join Date: Aug 2005
Location: DFW area TX
Posts: 5,383
Send a message via AIM to JeffTsai
Default DIY Guide: 2014 GS350 F-Sport Lowering Spring Install Guide

I've done quite a few of these installs already for plenty of people. However, I never really had the time to snap any photos because I just blast through the install, and finish quickly. Doing everything properly of course. Taking photos slows me down about 50 percent because I have to frame the shots, and plan for the DIY guide in advance. Then sometimes I have to go back, and put everything back together to take another photo because the shots didn't turn out how I liked.

A few precautions before you start. BE CAREFUL with the ABS sensors and cables. Make absolutely sure to move them out of the way when doing the install. A quick mistake can easily cost you $200-300+ for each sensor! Treat them like leads on a bomb you're trying to diffuse lol.

Also, remember the suspension springs in the car are under very high tension. It can get dangerous very quickly if you don't do the install correctly. If you aren't very confident, then I would recommend you take it to a shop so you don't suffer any personal injury or damage the car. I assume no liability of damage or injury you sustain during or after the install if you don't do it properly!

Thanks to member Jon( jmtamu) for allowing me to use his car for the DIY photo opportunity.

Enough with the intro, now onto the guide!

DIY GUIDE START:

All stock 2014 GS350 F-Sport. Brand new beautiful car with only 500 miles on the odometer! Nice Vossen wheels just installed, but needing a slight drop.
Click the image to open in full size.

First, jack up the front of the car from the appropriate lifting point. It's on the center for the front crossmember. Support the car with jackstands and then proceed to take the wheels off. I threw on some F-Sport Decals I made to see how it looked. I think they look pretty cool, but I took them off after the photos since I didn't know if Jon wanted them on there or not.
Click the image to open in full size.

This will have to be removed. Instructions further down.
Click the image to open in full size.

These bolts will have to be removed as well. The clip is the ABS sensor I was talking about. Be sure to remove that and be very careful with it!
Click the image to open in full size.

Use a small flathead screwdriver to release the hidden clip.
Click the image to open in full size.

Remove the sway bar end link. It's held on by a 17mm nut.
Click the image to open in full size.

ABS sensor cable removed. DO NOT MISS THIS STEP or else you will regret it later!
Click the image to open in full size.

Remove these two 10mm nuts as well. After that, swing the sensor cable out of harms way. I took this photo later after the springs were installed(hence the red springs).
Click the image to open in full size.

Use needle nose pliers to release the clip. Then remove the 17mm castle nut.
Click the image to open in full size.

Use a arm puller to release the ball joint. DO NOT HAMMER THE ARM!!! It's aluminum and will deform if you hammer the arm!
Click the image to open in full size.

Pop and it's off.
Click the image to open in full size.

Now pop the hood and peek inside. These are the protective covers for the AVS actuator motors. If your car is not equipped with AVS then these caps probably won't be there, and there will be no motors underneath. This is the motor that adjusts the stiffness of the shocks when going into Sport Mode.
Click the image to open in full size.

Remove the three 14mm nuts holding on the covers.
Click the image to open in full size.

Simply rotate the motor counterclockwise and pull up. Then swing the motor out of the way.
Click the image to open in full size.

There are three more 14mm nuts underneath. These are the ones that hold the shock to the car. Remove these and the shock will drop down.
Click the image to open in full size.

I didn't take many pictures here because I was wrestling the shock to get it out of the car. While the arm is disconnected(swinging freely), you have plenty of room to pull the shock out. Once you pull it out, lightly thread the nut back on just to hold the arm in place. This prevents the wheel spindle from hanging off the brake line and over stressing it.
Click the image to open in full size.

Suspension removed from the car.
Click the image to open in full size.

Use a spring compressor to compress the spring. Using air tools really helps here.
Click the image to open in full size.

Make sure you have compressed the spring sufficiently, and relieved the tension. The spring will fly off(very dangerous) if you remove the nut without relieving the spring tension.
Click the image to open in full size.

Spring removed from the shock body. Remove the strut mount(top piece) and place it on the new spring.
Click the image to open in full size.

Stock front spring vs Tanabe spring.
Click the image to open in full size.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
__________________
2008 GS450h Hybrid Power! The new Daily Driver
2005 GS300 GTE VVTi Custom 76mm Billet Wheel Triple BB HKS T51R The 4 Door Race Car...in the making
2002 GS300 Sport Design Graphite Grey Pearl 914rwhp/785ftlb@34psi NA-T Built A650E Kinda Daily Driver E85 Powered 11:1 CR


Please email me instead of PM. I don't always empty the PM, and I don't check it as often.
Email me here and it goes direct to my phone powerdynamix@gmail.com
JeffTsai is offline   Reply With Quote
Old 03-30-14, 01:46 AM   #2
JeffTsai
Lexus Fanatic
Trader Score: (1)
 
JeffTsai's Avatar
 
Join Date: Aug 2005
Location: DFW area TX
Posts: 5,383
Send a message via AIM to JeffTsai
Default

Here is the new spring installed with the shock fully assembled. Remember to note which side goes up or down. There is a skinny side and a thick side to the spring. Just follow the same direction as the stock spring. Also, remember that the spring needs to line up in the bottom perch. Then make sure that the top hat lines up the same way as the stock direction. Basically, just reinstall everything in the reverse order of dissasembly. Make sure to take note of how all the stock stuff was oriented.
Click the image to open in full size.

Suspension reinstalled into the car. I didn't have a chance to list all of the torque specs. It's all available in the factory service manual. I will have to get another copy since I accidentally threw the sheet away after install.
Click the image to open in full size.

Remember to reinstall the ABS cable that you tucked away safely earlier. The connector side just clicks straight into the sensor.
Click the image to open in full size.

Now for the rear install. I didn't get a chance to take too many photos because you have to wrestle with the rears to get them off/on. The rears are also a bit more tricky to do since the whole arm is under extreme tension. Make sure you follow the instructions carefully so the spring won't come flying out of there!
Click the image to open in full size.

Here's another shot of the rear suspension.
Click the image to open in full size.

You will need to remove these 2 bolts. DO NOT remove them until you have properly supported the arm from underneath. If you pull the bolts without supporting underneath, the spring will fly out violently.
Click the image to open in full size.

You will need to remove the ABS sensor in the rear as well. These 3 bolts will take the sensor out. DO NOT miss this step! Tuck the sensor away to the side so it's out of harms way.
Click the image to open in full size.

Remove the 17mm nut for the sway bar.
Click the image to open in full size.

ABS sensor removed.
Click the image to open in full size.

Use a second jack to raise up the arm until you can feel the bolts get loose. You should be able to pull the bolts straight out after you have relieved the tension. After you have removed the 2 bolts, loosen the inner 19mm nut(don't remove just loosen). Now VERY slowly let the supporting jack down. The arm will swing down and the spring will be relieved of tension. After that, the spring can be pulled out by hand easily.

So remember: RAISE jack first, remove 2 bolts, loosen inner nut, and then lower jack VERY SLOWLY.
Click the image to open in full size.

Sorry I didn't get many photos of these steps. You have to really man handle the suspension to get it all on. So to reinstall the rear, make sure the new spring goes in the same way as the stock one. Note which side of the spring is skinny and which is wide. The stock spring has the skinny on top and wide on bottom. Put the rubber alignment cone into the top of the spring. Put the spring back into place between the body and the arm. After that, place the jack back under the arm and raise it slowly until you are able to put the bolts back into the arm. You will have to do plenty of wrestling around with the rear spindle to get the holes to line up. Torque everything back and you're good to go!
Click the image to open in full size.

Here's a shot of the car with the install of the Tanabe NF210 springs completed.
Click the image to open in full size.

Hopefully this guide is helpful for those of you wanting to attempt a DIY shot at the suspension install. Sorry if some of the steps aren't 100% conclusive, but most of the stuff will be self explanatory once you're in there.
__________________
2008 GS450h Hybrid Power! The new Daily Driver
2005 GS300 GTE VVTi Custom 76mm Billet Wheel Triple BB HKS T51R The 4 Door Race Car...in the making
2002 GS300 Sport Design Graphite Grey Pearl 914rwhp/785ftlb@34psi NA-T Built A650E Kinda Daily Driver E85 Powered 11:1 CR


Please email me instead of PM. I don't always empty the PM, and I don't check it as often.
Email me here and it goes direct to my phone powerdynamix@gmail.com

Last edited by JeffTsai; 03-30-14 at 01:53 AM..
JeffTsai is offline   Reply With Quote
Old 03-30-14, 03:15 AM   #3
jkeifer3
Lexus Test Driver
Trader Score: (0)
 
jkeifer3's Avatar
 
Join Date: Aug 2005
Location: VA
Posts: 887
Default

Great DIY post! Thanks for all your efforts in documenting this!
__________________
62 Austin Healey Sprite (sold), 64 Triumph TR-4 (sold), 68 Chevrolet Corvette 427 c.i. 435 h.p. (sold), 73 Chevy Nova SS-350 replaced with 427 cid big block (sold), 82 & 89 Porsche 928s (sold), 90 Taurus SHO (sold), 96 Fix Or Repair Daily Taurus (sold), 95 Lexus SC-400 (sold), 99 Corvette (sold), 02 Corvette Z-06 (sold), 04 Lexus SC-430 (sold), 06 Lexus GS-300AWD (sold), 09 Mazda CX-7 (sold), 08 Lexus IS-F MMR (sold), 11 Jeep Grand Cherokee (current), 13 GS-350 RR (current)
jkeifer3 is offline   Reply With Quote
Old 03-30-14, 09:41 AM   #4
jmtamu
Driver
Trader Score: (0)
 
Join Date: Mar 2010
Location: TX
Posts: 171
Default

Thanks again Jeff. The F-Sport Decals look really good. I wish you would have left them on. I'll have you add them next time I see you.
jmtamu is offline   Reply With Quote
Old 03-30-14, 10:20 AM   #5
islandbeef
Lead Lap
Trader Score: (0)
 
islandbeef's Avatar
 
Join Date: Feb 2014
Location: SD/SoCal 858
Posts: 566
Default

Great and useful documentation. Good job! Thanks for posting.
__________________
'13 GSF RWD - Stock - 15% Tint - Daily Driver

Retired: 2011 Acura TSX Sport Wagon, 2008 Acura MDX Tech, 2000 Lexus LX-470, 1999 BMW 528i Sport Touring, 2001 BMW 740i Sport, 2000 Land Rover Discovery II, 1994 Acura Legend L Sedan
islandbeef is offline   Reply With Quote
Old 03-30-14, 10:38 AM   #6
Kayman
Rookie
Trader Score: (0)
 
Kayman's Avatar
 
Join Date: Mar 2014
Location: Ontario
Posts: 96
Default

Awesome post. You have convinced me this is something best left to a professional.
Kayman is offline   Reply With Quote
Old 03-30-14, 11:05 AM   #7
lexaz24
Driver School Candidate
Trader Score: (0)
 
Join Date: Feb 2014
Location: Virginia
Posts: 7
Default

yes, i agree. great job on the diy. Im gonna leave it up to the experts for this one. i considered the tanabe
I ended up buying the RSR- springs instead.
lexaz24 is offline   Reply With Quote
Old 03-31-14, 02:36 PM   #8
jmtamu
Driver
Trader Score: (0)
 
Join Date: Mar 2010
Location: TX
Posts: 171
Default

Everything back within spec after alignment.
Click the image to open in full size.
jmtamu is offline   Reply With Quote
Old 03-31-14, 08:44 PM   #9
Stormforge
executive matchup
Trader Score: (0)
 
Stormforge's Avatar
 
Join Date: Apr 2008
Location: BC
Posts: 5,779
Send a message via MSN to Stormforge
Default

Jeff, thx for posting this. Adding to the FAQ...
__________________

2008 Lexus GS 450h - Obsidian/Black (fully loaded Cdn version) - For GSh mod list, click here

2010 Lexus RX 450h - Aurora White Pearl/Black - Package C (Ultra Premium Package)

JDM fog light junkie
Stormforge is offline   Reply With Quote
Old 04-04-14, 03:10 PM   #10
LexFather
Guest
Trader Score: ()
 
Posts: n/a
Default

Jeff, glad to see an O.G in the 4GS forum, great pics and write-up!!
  Reply With Quote
Old 04-05-14, 01:32 PM   #11
Polo708
Driver
Trader Score: (0)
 
Polo708's Avatar
 
Join Date: Mar 2014
Location: Florida
Posts: 136
Default

What are the differences with the AWD?

Are there additional parts/bolts to be disconnected or is it just a difference in the spring itself?
Polo708 is offline   Reply With Quote
Old 04-05-14, 06:16 PM   #12
SNiiP3R
Lexus Champion
Trader Score: (0)
 
SNiiP3R's Avatar
 
Join Date: Dec 2005
Location: Fuhgeddaboudit
Posts: 2,812
Default

Quote:
Originally Posted by Polo708 View Post
What are the differences with the AWD?

Are there additional parts/bolts to be disconnected or is it just a difference in the spring itself?
The rear should be identical, the front struts are different on AWD models. So, these instructions maybe slightly off when it comes to changing the front springs. Both RWD and AWD use the same springs, so no difference there.
__________________
2013 GS350
2008 GS350 - Hurricane Sandy took her away Click here for pictures
2001 GS300 - Sold
SNiiP3R is offline   Reply With Quote
Old 04-06-14, 01:30 PM   #13
Dukeaudio
Driver
Trader Score: (0)
 
Join Date: Apr 2013
Location: Az
Posts: 135
Default

Great write-up...plan on doing once i get my springs. Sorry if i missed it but what are the bolt torque specs? Thx.
Dukeaudio is offline   Reply With Quote
Old 04-21-14, 11:45 AM   #14
Dukeaudio
Driver
Trader Score: (0)
 
Join Date: Apr 2013
Location: Az
Posts: 135
Default

Printed this DIY and used it as a guide to install my springs over the weekend. Jeff's instructions were spot-on. Anyone planning on doing this, a high torque impact wrench and a good low profile 2-3 ton jack will save you time. The most labor intensive step for me was compressing the springs (front) so make sure you have a decent set of compressors. Another note for the fronts, like Jeff warned, make sure you note the orientation of the top cap/parts and reasseble accordingly. I used a blue dot and markings on the top of the tower as reference points. A pry bar, and long screwdriver will help align bolts for the rear (PITA). Last, make sure you have something to put under the front tires when lowering after install. If not, since car is lower, you might have trouble removing the jack from underneath. Again, big thanks to Jeff for the great DIY Guide. I am by no neans a skilled auto mechanic but the DIY made it seem like i knew what i was doing.
Dukeaudio is offline   Reply With Quote
Old 04-22-14, 05:21 PM   #15
Bobby337
Driver School Candidate
Trader Score: (0)
 
Join Date: Oct 2012
Location: Ca
Posts: 5
Default fluid

I accidentally flipped over the front shocks and fluid was coming out from the top. Anyone experienced this? Not sure what fluid to fill back and where. Looks like hydraulic fluid.
Bobby337 is offline   Reply With Quote
Old 04-22-14, 05:21 PM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
part number for wingy thingy sam430 GS - Fourth Generation 1 07-30-14 11:30 AM
TX 1998 Lexus GS400 Silver 143k JeffTsai Lexus Vehicles Classifieds 3 07-14-14 03:25 PM
TX FS: BBK Brembo GT 355mm 4 Piston Black JeffTsai SC400 / 300 Classifieds 1 06-01-14 03:30 PM
TX FS: BBK Brembo GT 355mm 4 Piston Black JeffTsai 2Gen GS430 / 400/ 300 Classifieds (98-05) 8 03-04-14 10:50 PM
Turbo Build Diary JeffTsai Performance 175 10-26-12 11:04 AM


Tags
2014, 4gs, diy, gs350, guide, is350, lexus, lowering, rwd, specs, sport, springs, suspension, tanabe, torque

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 04:18 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info