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DIY Rear Suspension Removal and Installation

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Old 04-15-07, 11:52 PM   #1
phollero
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Default DIY Rear Suspension Removal and Installation

Here is what I did for the rear suspension remove and install. I replaced my stock original shocks and springs with KYB GR2 shocks and RSR lowering springs. They lowered about 1 3/4 inches.

If you are interested in the front suspension install, see my other post here:
http://www.clublexus.com/forums/gs-first-generation/275482-instructions-for-front-suspension-installation.html

You will need a spring compressor, ratchet set, wrench set, door panel puller, torque wrench and an optional impact wrench.

Remember to have your alignment checked after doing suspension work.

I followed the Lexus service manual with the exception of the brake caliper, which the manual said to remove but I did not. You'll see pictures of how I got the shock out without taking off the calipers.

Lets begin...

REMOVAL
1. REMOVE LUGGAGE COMPARTMENT TRIM FRONT
COVER AND FLOOR MAT

Click the image to open in full size.

Use a panel removal tool and pry off the 4 fasteners on top.
Click the image to open in full size.

Remove the trunk mat and pry off the fasteners at the bottom.
Click the image to open in full size.

Here's what's behind the luggage compartment trim.
Click the image to open in full size.



2. REMOVE REAR WHEEL Torque: 103 N·m (1,050 kgf·cm, 76 ft·lbf)

Jack up the car at the rear cross member (do not lift by the differential near it)
Click the image to open in full size.

Support both sides with jack stands at the jack points listed in the owner's manual
Click the image to open in full size.

3. REMOVE REAR BRAKE CALIPER (I DID NOT DO THIS, though it is easier to get the shock out of the wheel well without the caliper)
(a) Remove the 2 bolts and brake caliper from the rear axle
carrier.
Torque: 104 N·m (1,065 kgf·cm, 77 ft·lbf)
(b) Support the brake caliper securely.

4. DISCONNECT REAR STABILIZER BAR LINK
Remove the nut and disconnect the stabilizer bar link from the
No.2 lower suspension arm.
Torque: 44 N·m (450 kgf·cm, 33 ft·lbf)

Click the image to open in full size.


5. REMOVE SHOCK ABSORBER WITH COIL SPRING

(a) Remove the nut and bolt on the lower side of the shock
absorber.
Torque: 137 N·m (1,400 kgf·cm, 101 ft·lbf)
HINT:
At the time of installation, after stabilizing the suspension,
torque the nut.

Click the image to open in full size.
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Last edited by phollero; 04-16-07 at 12:25 AM.. Reason: Additional information.
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Old 04-15-07, 11:59 PM   #2
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Default Rear suspension install continued...

(b) Loosen the nut in the middle of the suspension support.
NOTICE:
Do not remove it.
Torque: 27 Nm (280 kgfcm, 20 ftlbf)

Click the image to open in full size.


(c) Remove the 3 nuts
Click the image to open in full size.

(d) Remove suspension support seat and shock
absorber with the coil spring.
Torque: 27 Nm (280 kgfcm, 20 ftlbf)

Push the wheel hub down and pull the shock spring assembly out like this. If you removed the caliper, you will have an easier time getting it out.
Click the image to open in full size.

Click the image to open in full size.

Make note of how the 3 screws at the top of the shock mount are oriented in relation to the shock.
Click the image to open in full size.
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Old 04-16-07, 12:05 AM   #3
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Default Rear suspension continued...

After compressing the spring with spring compressors, remove the piston rod lock nut.
Click the image to open in full size.

Remove the shock mount. If it is stuck, use a rubber mallet to gently tap it off.
Click the image to open in full size.
Click the image to open in full size.

Remove the shock boot (insulator)
Click the image to open in full size.

Upon inspection, see mine is coming apart. I used a hot glue gun and electrical tape to repair it.
Click the image to open in full size.

Remove the spring from the shock.
Click the image to open in full size.
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Old 04-16-07, 12:14 AM   #4
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Default Rear suspension install continued...

Here is a comparison of the old and new shocks.
Click the image to open in full size.

Comparison of old and new springs.
Click the image to open in full size.


REASSEMBLY
INSTALL SUSPENSION SUPPORT AND COIL SPRING

(a) Install the lower insulator to the shock absorber.
(b) Install the spring bumper sub–assembly to the suspension
support.
(c) Using spring compressor, compress the coil spring.
(d) Install the coil spring to the shock absorber.
HINT:
Fit the lower end of the coil spring into the recess of the spring
seat of the shock absorber.
(e) Install the suspension support to the rod and temporarily
tighten a new nut.
(f) Rotate the suspension support so that the rod and 1 of the
bolts on suspension support are aligned with the lower
bracket.
(g) Remove the spring compressor
HINT:
Recheck the direction of the suspension
support.

Click the image to open in full size.

Click the image to open in full size.

Here is the new shock-spring assembly installed by just reversing the instructions above.

AFTER
Click the image to open in full size.

BEFORE
Click the image to open in full size.
Remember to torque all nuts and bolts to the specifications mentioned.
Click the image to open in full size.

That's it. Good luck.

TOTAL TIME: 4 Hours
1 hour preparation, 1 hour per wheel, 1 hour cleanup/double checking work.

Last edited by phollero; 04-16-07 at 12:18 AM..
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Old 04-16-07, 12:25 AM   #5
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Excellent write up all the way around. HUGE
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Old 04-16-07, 01:13 AM   #6
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another great write up thanks
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Old 04-16-07, 10:32 AM   #7
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Another MUCH needed and EXCELLENT write up.

Now only if i had my camera to hand when i did my balljoints.
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Old 08-20-07, 12:00 PM   #8
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guys, on step # 4 where you disconnect the rear stabilizer bar link (at the lower nut), what did you do to hold the whole assembly still? when I turn the nut, the bolt is spinning as well, despite liberal application of PB Blaster. I am trying to hold thing thing still with some vise grips, c-clamps etc. but not a lot of luck.

I noticed the fastener originally had a tab on it so the whole assembly would stay still. But mine, with 140k miles on it, is very delicate, and is bending.

Any advice?
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Old 08-20-07, 12:18 PM   #9
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Great DIY and nice illustrations! Thanks for sharing
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Old 08-20-07, 03:33 PM   #10
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Nice write up and great pics!
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Old 08-21-07, 05:31 AM   #11
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Quote:
Originally Posted by bguild View Post
guys, on step # 4 where you disconnect the rear stabilizer bar link (at the lower nut), what did you do to hold the whole assembly still? when I turn the nut, the bolt is spinning as well, despite liberal application of PB Blaster. I am trying to hold thing thing still with some vise grips, c-clamps etc. but not a lot of luck.

I noticed the fastener originally had a tab on it so the whole assembly would stay still. But mine, with 140k miles on it, is very delicate, and is bending.

Any advice?
Yeah i noticed on mine it started doing the same thing. I too tried to hold it steady but to no availe.

Best thing to do it get a friend with a long bar, place the end of the bar under the chassis and then one bit of the bar on top of the rear caliper. Then just simply push down far enough until you can get the strut out. Thats what i did on both side of my car, no negative effects and nothing went bang either.

Basically, your looking at prising it apart enought to get the strut out.

Hope that helps.
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Old 08-21-07, 06:44 PM   #12
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great write up, it could be helpfull when i want to lower my car next spring. any pics of the car with the 1 3/4 inch drop
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Old 08-22-07, 01:56 AM   #13
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Quote:
Originally Posted by George.S. View Post
great write up, it could be helpfull when i want to lower my car next spring. any pics of the car with the 1 3/4 inch drop

Here's how the car sits after the front and rear suspension work.


Click the image to open in full size.


Click the image to open in full size.
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Old 08-22-07, 03:29 PM   #14
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NICE!!!..... that hide the gap pretty well. i wish my GS was black, its like a off red color. well.... its more like maroon.
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Old 08-23-07, 07:34 PM   #15
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Quote:
Originally Posted by phollero View Post

Here's how the car sits after the front and rear suspension work.


Click the image to open in full size.


Click the image to open in full size.
what size rims are these?
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Old 08-23-07, 07:34 PM
 
 
 
 
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