BMW 318/325/M3/525/535/M5 1989-1993 Repair Information

Thrust Rod

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REMOVAL & INSTALLATION



E34 5 Series

See Figure 1



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Fig. Fig. 1: Front suspension components-E34 5 Series

The E34 5 Series uses a multi-link type suspension. There is a lower control arm to support the strut housing and a thrust rod to control fore and aft motion. The thrust rod is not used on 3 Series vehicles.

Always replace the strut rods in pairs. If the strut rods are not replaced in pains, uneven driving response may result.

  1. Raise and safely support the front end. Do not place the jackstands under any suspension parts. Remove the wheel.
  2.  
  3. Remove the thrust rod ball joint nut and press the stud out of the steering knuckle with a ball joint remover tool.
  4.  
  5. Remove the nut and bolt at the subframe end of the strut rod. Remove the strut rod.
  6.  

To install:
  1. Install the strut to the subframe using a new nut and washer on both sides. Do not torque at this point.
  2.  
  3. Clean the grease and dirt off of the ball joint stud and bore. Install the ball joint stud into the steering knuckle and torque the new nut to 67 ft. lbs. (93 Nm).
  4.  
  5. Install the wheel and lower the vehicle to the ground. Load 150 lbs. into each of the front seats and in the center of the rear seat. Torque the control arm to subframe bolt to 92 ft. lbs. (127 Nm).
  6.  

BUSHING REPLACEMENT



See Figures 2, 3 and 4



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Fig. Fig. 2: With the vehicle loaded and at normal ride height, the gap at A in the lower control arm bushing should be 0.039-0.079 in. (1.0-2.0 mm)-E34 5 Series



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Fig. Fig. 3: The lower control arm bushing arrow should match the cast boss on the bracket-E34 5 Series



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Fig. Fig. 4: The bushing should protrude evenly when installing a replacement

The bushings must be pressed out of the housing bores. BMW bushings are notoriously hard to press out of the housings. Use a high capacity hydraulic press, penetrating lubricant and the proper sized mandrels for the press. Do not use sockets to try to replace the bushings. Mark the relationship of the bushing to the bore for correct replacement positioning.

 
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