GM 12479345
Idler Arm

Firstly, raise the vehicle to service and repair the Idler Arm. On the use of the universal steering linkage puller (J 24319-B), separate all of the ball joints. Drill and remove the two bolts from the Idler Arm and the prevailing torque nut out of the Idler Arm ball stud, and dispose of the nut. Then, use the j 24319-b to remove the relay rod from the Idler Arm, and also remove the Idler Arm. The ball stud threads and seal should be inspected for breakage, and the threads on the ball stud and the ball stud nut should be cleaned. For installation, mount the Idler Arm to the frame and install the bolts and tighten it to 105 nm (77 ft. Lbs). Accordingly, attach the relay rod to the Idler Arm ball stud using the steering linkage installer (J 29193), make sure that the seal is in place, and tighten to 54 nm (40 ft. Lbs.) to mold the tapers in a proper manner. After disassembly of j 29193, replace a new prevailing torque nut to the Idler Arm ball stud and tighten the nut to 47 nm (35 ft. Lbs.). Finally, lower the vehicle and regulate the toe-in.

When replacing the idler arm you must first raise the vehicle then disconnect its two keeping bolts. The prevailing torque nut needs removal from both the idler arm ball stud. The Steering Linkage and Tie Rod Puller (J 24319-B) separates the relay rod from the idler arm before you remove the arm. Examine the ball stud threads before cleaning both the ball stud threads and ball stud nut threads. Also verify the ball stud seal remains intact without any damage. Mount the idler arm to the frame after installing two bolts which need to be tightened to 105 Nm (77 ft. lbs.). Demonize the Steering Linkage Installer (J 29193) for inserting the relay rod onto the idler arm ball stud while maintaining the seal position on the stud then fasten with 54 Nm (40 ft. lbs.) for taper seating. To replace the J 29193 locking tool you must install a new prevailing torque nut at the idler arm ball stud before tightening it to 47 Nm (35 ft. lbs.). The vehicle needs to be brought near the ground level before final toe-in adjustment.

The repair and service of idler arm requires two essential tools: Steering Linkage and Tie Rod Puller (J 24319-B) and Steering Linkage Installer (12 mm) (J 29193). Raising the vehicle allows access to remove two bolts from the idler arm. The prevailing torque nut on the idler arm ball stud should be taken off before it is discarded. The Service procedure starts with a Steering Linkage and Tie Rod Puller (J 24319-B) to disconnect the relay rod from the idler arm followed by idler arm removal. Thoroughly examine both the ball stud threads and seal before cleaning every thread on the ball stud and in the ball stud nut. To install the idler arm position it on the frame before tightening its bolts to 105 Nm torque equivalent to 77 foot pounds. The Steering Linkage Installer (J 29193) with 12 mm diameter (J 29193) should be used to place the relay rod onto the idler arm ball stud while maintaining the seal positioned correctly on the stud before tightening it to 54 Nm (40 ft. lbs.) for taper seating. Use a new prevailing torque nut to secure the idler arm ball stud while tightening it to 47 Nm (35 ft. lbs.) using the Steering Linkage Installer (J 29193). Adjustment of toe-in should be completed after lowering the vehicle.