Idler Arm: Testing and Inspection

Idler Arm Inspection


Tools Required
* J 35999 Spring Scale
* J 42640 Steering Column Anti-Rotation Pin
* J 45101 Hub and Wheel Runout Gage



1. Raise the vehicle on a hoist and support it with jackstands. Refer to Lifting and Jacking the Vehicle .





Notice: The wheels of the vehicle must be straight ahead and the steering column in the LOCK position before disconnecting the steering column or intermediate shaft from the steering gear. Failure to do so will cause the SIR coil assembly to become uncentered, which may cause damage to the coil assembly.

2. Position the wheels straight-ahead and install anti-rotation pin J 42640 .
3. Install runout gauge J 45101 between the idler arm and the vehicle frame.
Ensure the runout gage is at zero before taking the measurement.




4. Place scale J 35999 near the relay rod end of the idler arm.




5. Exert a 110 N.m (25 lb) force upward and then downward while measuring the total distance the idler arm moves.




6. If the movement exceeds 2 mm (0.078 in) then replace the idler arm.




7. Install the runout gauge at the idler arm.
8. Push the tire inward slowly with one hand to remove any lash.
Zero out the runout gauge and pull outward in order to take a reading.




9. Allow only 1 mm (0.039 in) of movement at the idler arm ball stud.
If the movement is more than 1 mm (0.039 in) then replace the idler arm.