Subaru BRZ 2013 · Service Manual Suspension

Rear shock absorber

Components Removal / installation

REAR SUSPENSION
REAR SHOCK ABSORBER
EXPLODED VIEW
REMOVAL
NOTE:
·The following procedure is for LH side.
·Service the LH side and the RH side using the same procedure.
1. Removal of the trunk floor mat
2. Removal of rear floor finish plate (Refer to )
3. Removal of trunk trim cover INN LH (Refer to )
4. Removal of rear tire
5. Removal of height control sensor RR LH
(1) Disconnect the connector.
(2) Remove 3 nuts, and then remove the height control sensor RR LH.
CAUTION:
If the height control sensor RR LH is dropped accidentally, replace it with a new one.
6. Disconnection of rear stabilizer link SUB-ASSY (installed on LH side)
(1) Remove the bolt and nut, and disconnect the rear stabilizer link SUB-ASSY from the rear suspension arm ASSY No. 2 LH.
7. Disconnection of rear suspension arm ASSY No. 2 LH
(1) Loosen the mounting nut of the rear suspension arm ASSY No. 2 LH and the rear suspension member SUB-ASSY.
CAUTION:
Loosen, but do not remove the nut.
(2) Remove the bolt and nut, and disconnect the rear shock absorber w/ coil spring LH from the rear suspension arm ASSY No. 2 LH.
(3) Remove the bolt and nut, and disconnect the rear axle carrier LH from the rear suspension arm ASSY No. 2 LH.
8. Removal of rear shock absorber w/ coil spring LH
(1) Remove the two nuts, and remove the rear shock absorber w/ coil spring LH from the vehicle.
CAUTION:
Hold the rear shock absorber w/ coil spring LH to prevent it from falling.
DISASSEMBLY
NOTE:
·The following procedure is for LH side.
·Service the LH side and the RH side using the same procedure.
1. Removal of rear support to rear shock absorber nut LH
(1) Secure a spring compressor in a vise.
(2) Place the hooks of the spring compressor arms across the diameter of the coil spring RR LH.
WARNING:
·Make sure that the upper and lower hooks of the spring compressor are placed as far from each other as possible on the coil spring RR LH.
·Make sure that the claws of the hooks are securely in place.
(3) Using the spring compressor, compress the coil spring RR LH.
WARNING:
·If the coil spring RR LH becomes curved like a bow during the compression process, stop the procedure immediately, and remove and reconnect the spring compressor.
·Do not compress to the point where parts of the coil spring touch each other.
·Do not use an impact wrench.
(4) After making sure that the coil spring RR LH is free, place the SST on the rear support to rear shock absorber nut LH. Secure the piston rod of the rear shock absorber ASSY using a deep socket hexagon, and remove the rear support to rear shock absorber nut LH.
WARNING:
Do not remove the rear support to rear shock absorber nut LH without the coil spring RR LH being free.
CAUTION:
·Be careful not to damage or deform the threaded portion.
·Fully insert the deep socket hexagon.
SST     20399FG000
2. Removal of rear suspension support ASSY LH
(1) Remove the rear suspension support ASSY LH from the shock absorber ASSY RR LH.
3. Removal of rear spring insulator LH
(1) Remove the rear spring insulator LH from the rear suspension support ASSY LH.
4. Removal of coil spring RR LH
(1) After removing the coil spring RR LH from the shock absorber ASSY RR LH, release the spring compressor and remove the coil spring RR LH.
CAUTION:
Do not use an impact wrench.
5. Removal of rear shock absorber dust cover LH
(1) Remove the rear shock absorber dust cover LH from the shock absorber ASSY RR LH.
6. Removal of rear spring bumper No. 1 LH
(1) Remove the rear spring bumper No. 1 LH from the shock absorber ASSY RR LH.
INSPECTION
1. Inspection of shock absorber ASSY RR LH
(1) Operation inspection of shock absorber ASSY RR LH
(a) Inspect the shock absorber ASSY RR LH by compressing it.
Criteria :  When it is compressed at a certain speed, the heaviness of each stroke is consistent, and it does not make any abnormal movement or sound. Also, when it extends, it returns to its original length at a consistent speed.
ASSEMBLY
NOTE:
·The following procedure is for LH side.
·Service the LH side and the RH side using the same procedure.
1. Installation of rear spring bumper No. 1 LH
(1) Install the rear spring bumper No. 1 LH on the shock absorber ASSY RR LH.
2. Installation of rear shock absorber dust cover LH
(1) Install the rear shock absorber dust cover LH on the shock absorber ASSY RR.
3. Installation of coil spring RR LH
(1) Secure a spring compressor in a vise.
(2) Place the hooks of the spring compressor across the diameter of the coil spring RR LH.
WARNING:
·Make sure that the upper and lower hooks of the spring compressor are placed as far from each other as possible on the coil spring RR LH.
·Make sure that the claws of the hooks are securely in place.
(3) Using the spring compressor, compress the coil spring RR LH.
WARNING:
·If the coil spring RR LH becomes curved like a bow during the compression process, stop the procedure immediately, and remove and reconnect the spring compressor.
·Do not compress to the point where parts of the coil spring touch each other.
·Do not use an impact wrench.
(4) Set the coil spring RR LH so that the end surface of the spring seats well in the stopper section of the lower spring seat.
Captions in illustration
*1
Coil spring RR LH
*a
0 to 10mm {0 to 0.394in}
*b
Stopper section of spring seat
4. Installation of rear spring insulator LH
(1) Install the rear spring insulator LH on the coil spring RR LH.
5. Installation of rear suspension support ASSY LH
(1) Install the rear suspension support ASSY LH on the shock absorber ASSY RR LH.
INSTALLATION
NOTE:
·The following procedure is for LH side.
·Service the LH side and the RH side using the same procedure.
1. Installation of rear shock absorber w/ coil spring LH
(1) Insert the rear shock absorber w/ coil spring LH into the vehicle.
(2) Using two new nuts, install the rear shock absorber w/ coil spring LH.

Standard value:
Tightening torque=30N·m { 306kgf·cm} {22.1ft·lbf}
2. Temporary tightening of rear suspension arm ASSY No. 2 LH
(1) Replace the mounting nut of the rear suspension arm ASSY No. 2 LH and the rear suspension member ASSY with a new nut and temporarily tighten it.
(2) Install the rear suspension arm ASSY No. 2 LH to the axle carrier, and temporarily tighten it with the bolt and a new nut.
CAUTION:
Insert the bolt from the front of the vehicle.
(3) Install the rear shock absorber w/ coil spring LH to the rear suspension arm ASSY No. 2 LH, and temporarily tighten it with the bolt and a new nut.
NOTE:
The bolt may be inserted from either side.
3. Temporary tightening of rear stabilizer link SUB-ASSY (installed on LH side)
(1) Install the rear stabilizer link SUB-ASSY to the rear suspension arm ASSY No. 2 LH, and temporarily tighten it with the bolt and a new nut.
4. Stabilization of vehicle
(1) Jack up the axle carrier by placing a wooden block between them, and apply a load to the suspension so that the rear drive shaft ASSY LH becomes level.
Captions in illustration
*a
Wooden block
5. Final tightening of rear suspension arm ASSY No. 2 LH
(1) Fully tighten the mounting nut of the rear suspension arm ASSY No. 2 LH and the rear axle carrier LH.

Standard value:
Tightening torque=80N·m { 816kgf·cm} {59.0ft·lbf}
(2) Fully tighten the mounting nut of the rear shock absorber w/ coil spring LH and the rear suspension arm ASSY No. 2 LH.

Standard value:
Tightening torque=80N·m { 816kgf·cm} {59.0ft·lbf}
(3) Fully tighten the mounting nut of the rear suspension arm ASSY No. 2 LH and the rear suspension member ASSY.

Standard value:
Tightening torque=80N·m { 816kgf·cm} {59.0ft·lbf}
6. Final tightening of rear stabilizer link SUB-ASSY (installed on LH side)
(1) Fully tighten the mounting nut of the rear stabilizer link SUB-ASSY and the rear suspension arm ASSY No. 2 LH.

Standard value:
Tightening torque=38N·m { 388kgf·cm} {28.0ft·lbf}
7. Installation of height control sensor RR LH
(1) With a nut, install the height control sensor RR LH to the rear suspension arm ASSY No. 2 LH.

Standard value:
Tightening torque=7.5N·m { 77kgf·cm} {5.5ft·lbf}
8. Installation of rear tire

Standard value:
Tightening torque=120N·m { 1224kgf·cm} {88.5ft·lbf}
10. Installation of rear floor finish plate (Refer to )
11. Installation of the trunk floor mat
12. Inspection and adjustment of rear wheel alignment (Refer to )
13. Initialization of headlight leveling computer (Refer to )
14. Headlight beam adjustment (Refer to )
15. Mid point setting of the VDC sensor (Refer to )
DISPOSAL
1. Disposal of shock absorber ASSY RR LH
(1) Secure the shock absorber ASSY RR LH in a vertical position.
(2) Press down on the piston rod with hands by approximately 60 mm {2.362 in}.