Nissan Stanza/200SX/240SX 1982-1992 Repair Guide

Shock Absorber

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REMOVAL & INSTALLATION



200SX
  1. Open the trunk and remove the cover panel if necessary to expose the shock mounts. Pry off the mount covers, if so equipped.
  2.  
  3. Remove the nut holding the top of the shock absorber. Unbolt the bottom of the shock absorber.
  4.  
  5. Remove the shock absorber.
  6.  
  7. Installation is the reverse of removal. Make sure rear shock retaining bushings and washer are installed in the correct position. Refer to the illustrations for additional specifications.
  8.  

Stanza 2WD Wagon

See Figure 1

  1. Raise and support the rear of the vehicle on jackstands.
  2.  
  3. Remove the upper nut and the lower mounting bolt form the shock absorber.
  4.  
  5. Remove the shock absorber from the vehicle.
  6.  
  7. To install, reverse the removal procedures. Make sure rear shock retaining bushings and washer are installed in the correct position. Refer to the illustrations for additional specifications.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Rear suspension - Stanza 2WD

TESTING



See Figure 2

The purpose of the shock absorber is simply to limit the motion of the spring during compression and rebound cycles. If the vehicle is not equipped with these motion dampers, the up and down motion would multiply until the vehicle was alternately trying to leap off the ground and to pound itself into the pavement.

Contrary to popular rumor, the shocks do not affect the ride height of the vehicle. This is controlled by other suspension components such as springs and tires. Worn shock absorbers can affect handling; if the front of the vehicle is rising or falling excessively, the "footprint" of the tires changes on the pavement and steering is affected.

The simplest test of the shock absorber is simply push down on one corner of the unladen vehicle and release it. Observe the motion of the body as it is released. In most cases, it will come up beyond it original rest position, dip back below it and settle quickly to rest. This shows that the damper is controlling the spring action. Any tendency to excessive pitch (up-and-down) motion or failure to return to rest within 2-3 cycles is a sign of poor function within the shock absorber. Oil-filled shocks may have a light film of oil around the seal, resulting from normal breathing and air exchange. This should NOT be taken as a sign of failure, but any sign of thick or running oil definitely indicates failure. Gas filled shocks may also show some film at the shaft; if the gas has leaked out, the shock will have almost no resistance to motion.



Click image to see an enlarged view

Fig. Fig. 2: When fluid is seeping out of the shock absorber, it's time to replace it

While each shock absorber can be replaced individually, it is recommended that they be changed as a pair (both front or both rear) to maintain equal response on both sides of the vehicle. Chances are quite good that if one has failed, its mate is weak also.

 
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