BMW Coupes and Sedans 1970-1988 Repair Guide

Injection Valves

Print

See Figures 1 and 2



Click image to see an enlarged view

Fig. Fig. 1: Example of injector valve installed in intake port



Click image to see an enlarged view

Fig. Fig. 2: Cut-away view of an injector valve

REMOVAL & INSTALLATION



Except 3.0Si, 530i, 630CSi and 633i Models
  1. With the injector tube and injector valves removed from the engine, cut the metal hose clamp sleeve and remove the sleeve.
  2.  
  3. Heat the hose with a soldering iron and remove the injector hose from the tube.
  4.  
  5. To install the injector valve assembly on the tube, clean the tube adapter and coat the inside of the hose with fuel.
  6.  
  7. Install the fuel injector hose with the hose sleeve on the injector tube and push against the stop, with the electrical terminal facing up.
  8.  
  9. Complete the installation in the reverse of the removal procedure.
  10.  

3.0Si Models
  1. Remove the electrical plug from the injection valves.
  2.  
  3. Loosen and remove the injection valve from the ring line.
  4.  
  5. Remove the retaining bolts and pull the injector from the manifold.
  6.  
  7. To install, replace the rubber ring and do not damage the nozzle jet during the installation.
  8.  

530i, 630CSi and 633i Models

See Figures 3 and 4

  1. With the air collector removed, unfasten the electrical connector plugs from the 6 injection valves.
  2.  
  3. Remove the valve retaining bolts and remove the injector tube with all the valves attached.
  4.  
  5. Remove the retaining clamps and remove the valves from the injector tube.
  6.  



Click image to see an enlarged view

Fig. Fig. 3: Unfasten the wire harness(es) attached to the injectors



Click image to see an enlarged view

Fig. Fig. 4: Sliding the injector fuel supply rail with injectors out from under the intake manifold

  1. To install, reverse the removal procedure.
  2.  

 
label.common.footer.alt.autozoneLogo