The power steering rack and pinion are never to be serviced or adjusted; malfunction or leakage necessitates replacement of the entire assembly. Before proceeding, secure the steering column in the lockout position to avert accidental over-extension of the
Clock Spring. To start, unscrew the cap off the power steering fluid reservoir and employ a siphon pump to draw out as much fluid as you can. Position the ignition key in the locked position and then twist the steering wheel to the left until it locks. While the vehicle sits on the ground, unhook the steering column shaft coupler from its connection with the rack and pinion intermediate coupler. Lift the vehicle on jack stands or perform a frame contact hoist and take off the front tires. Elevate the heat sleeve on the power steering return hose, expose its connection to the steel tube and then detach the hose and let the residual fluid drain. Hold the outside
Tie Rod End stud with an 11/32 socket as you unfasten the nut that joins the outer tie rod end to the
Steering Knuckle. Install Puller Special Tool Mb-990631 or Mb-991113, then employ the tool to remove the two tie rod ends from the steering knuckles. Release the two bolts and ease off the third fastener that connects the antilock brakes Hydraulic Control Unit (Hcu) to the front suspension cradle, then rotate the Hcu rearward to reach the cradle plate attaching nut and bolt. Disconnect the ten nuts and bolts affixing the cradle plate to the front suspension cradle, then lift the plate away. Ip you have All-Wheel Drive, also remove the power transfer unit. Disconnect the bracket that holds the power steering fluid tubes to the front suspension cradle. Employ an 18 mm crowfoot to detachment the power steering fluid pressure and return lines from the rack and pinion, then unfasten the three bolts and nuts attaching the rack and pinion to the front suspension cradle. Maneuver the rack and pinion downward enough to reach its intermediate coupler roll pin and then pull the roll pin out with Remover/Installer Special Tool 6831a. Disconnect the intermediate coupler from the rack and pinion shaft and take the rack and pinion assembly out of the front suspension cradle. During reinstallation, set the rack and pinion within the front suspension cradle, leaving room for the intermediate coupler. Start the roll pin into the intermediate coupler then install the rack and pinion shaft. Tap the roll pin in with a hammer, press it securely with Remover/Installer Special Tool 6831a and finally mount the rack and pinion assembly to the cradle using the three mounting bolts and nuts, tightening them to 183 Nm (135 ft. lbs.). Connect the power-steering fluid pressure and return lines, then tighten their fittings to 31 Nm (275 inch lbs.). Slide the tie-rod end into the steering knuckle and secure the attaching nut on the stud, then, using an 11/32 socket to restrain the stud, tighten the nut to 54 Nm (40 ft. lbs.). Should the vehicle be equipped with All-Wheel Drive, reinstall the power transfer unit. Fit the cradle plate onto the front suspension cradle using ten bolts and nuts and tighten them to 165 Nm (123 ft. lbs.). Reinstall the bracket for the power steering fluid tubes and thread the return line hose onto the steel tube, clamping it down with a screw-type hose clamp tightening to 2 Nm (18 inch lbs.). Confirm that the protective heat shield sleeves envelop the full length of the rubber hose and its junction to the steel tube, then align and secure them to the hoses with the tie strap. Refit the front wheels and tires, torqueing their lug nuts to 129 Nm (95 ft. lbs.). Lower the vehicle sufficiently so that the interior can be reached, then align the intermediate coupler shaft with the steering column coupler and assemble the steering column shaft coupler onto the rack and pinion intermediate coupler. Fasten the pinch bolt nut against the steering column coupler to achieve 28 Nm (250 inch lbs.) of torque. Carry out the
Power Steering Pump Initial Operation service procedure to top off and bleed the power steering system, verify for leaks and correct the front toe.