GM Cutlass RWD 1970-1987 Repair Guide

Diesel Engine Adjustments

Imprimir

Before making any linkage adjustments, check the injection timing, and adjust if necessary. Also note that these adjustments should be performed together. The vacuum valve adjustment (THM350's only) on 1979 and later models requires the use of several special tools. If you do not have these tools at your disposal, refer the adjustment to a qualified, professional technician.

THROTTLE ROD



See Figures 1 and 2

  1. If equipped with cruise control, remove the clip from the control rod, then remove the rod from the bellcrank.
  2.  
  3. Remove the throttle valve cable (THM200) or detent cable (THM350) from the bellcrank.
  4.  
  5. Loosen the locknut on the throttle rod, then shorten the rod several turns.
  6.  
  7. Rotate the bellcrank to the full throttle stop, then lengthen the throttle rod until the injection pump lever contacts the injection pump full throttle stop. Release the bellcrank.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Diesel throttle adjustment



Click image to see an enlarged view

Fig. Fig. 2: Diesel throttle valve cable adjustment

  1. Tighten the throttle rod locknut.
  2.  
  3. Connect the throttle valve or detent cable and cruise control rod to the bellcrank. Adjust if necessary.
  4.  

THROTTLE VALVE CABLE OR DETENT CABLE



  1. Remove the throttle rod from the bellcrank.
  2.  
  3. Push the snap lock to the disengaged position.
  4.  
  5. Rotate the bellcrank to the full throttle stop and hold it there.
  6.  
  7. Push in the snap lock until it is flush with the cable end fitting. Release the bellcrank.
  8.  
  9. Reconnect the throttle.
  10.  

VACUUM VALVE



See Figures 3 and 4

1981 and Later Models
  1. Remove the air cleaner assembly.
  2.  
  3. Remove the air intake crossover from the intake manifold. Cover the intake manifold passages to prevent foreign material from entering the engine.
  4.  
  5. Disconnect the throttle rod from the injection pump throttle lever.
  6.