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# Suspension - Rear Upper Control Arm Installation Precautions

NUMBER 039
GROUP Chassis
DATE September 2012
MODEL Optima (TF/QF/HEV) 2011/13MY
SUBJECT:
CAUTION DURING REAR UPPER ARM SERVICE
This bulletin provides cautionary information relating to the optima when installing the rear upper arm to the subframe to prevent potential quality concerns regarding rear upper arm bolt. Without properly aligning the bolt holes of rear upper arm and subframe (horizontally), the bolt securing the rear upper arm to the subframe may become loose, and as a result, rust and noise concerns may occur later on.
CAUTION DURING REAR UPPER ARM SERVICE:
1. When installing the rear upper arm, first position it to the carrier/axle assembly (A) using a bolt.
Tightening Torque Specifications:
101.3-115.7 lb-ft (137.4-157.0 Nm)
NOTICE
For detailed service procedure regarding the rear upper arm, refer to applicable Service Manual.
2. Before installing the rear upper arm to the subframe, support the end of rear lower arm (B) with a transmission jack and raise the jack until the bolt hole of rear upper arm is properly aligned with the subframe (horizontal axis line).
If the bolt is tightened without properly supporting the rear lower arm, the bolt to the subframe may be on a slanted axis (C) as shown in the photo above.
3. Ensure the bolt is positioned horizontally (d) when installing the rear upper arm to the subframe as indicated in the photo.
CAUTION
Tightening the bolt without properly aligning the bolt holes of rear upper arm and subframe (horizontally), the bolt (E) securing the rear upper arm to the subframe may become loose, and as a result, rust and noise concerns may occur later on.
4. The rear wheel alignment should be checked after performing this procedure.
AFFECTED VEHICLE PRODUCTION RANGE