Chrysler Full-Size Vans 1967-1988 Repair Guide

Fuel Pump

Print

REMOVAL & INSTALLATION



See Figures 1 through 6

Click image to see an enlarged view

Fig. Fig. 1: Fuel pump mounting details for the inline 6-cylinder engines



Click image to see an enlarged view

Fig. Fig. 2: Fuel pump mounting details for the 318 and 360 engines



Click image to see an enlarged view

Fig. Fig. 3: Fuel pump mounting details for the 400 and 440 engines



Click image to see an enlarged view

Fig. Fig. 4: To remove the fuel pump on V8 engines, disconnect the fuel lines at the pump



Click image to see an enlarged view

Fig. Fig. 5: After you have loosened the mounting bolts, remove the pump from the engine



Click image to see an enlarged view

Fig. Fig. 6: Before installation, clean all traces of the old gasket, then position a new one on the pump


CAUTION
Never smoke when working around gasoline! Avoid all sources of sparks or ignition. Gasoline vapors are EXTREMELY volatile!

  1. Disconnect the fuel lines from the inlet and output sides of the fuel pump.
  2.  
  3. Plug these lines to prevent gasoline from leaking out.
  4.  
  5. Unbolt the retaining bolts from the fuel pump and remove the fuel pump from the engine.
  6.  
  7. Remove the old gasket from the engine and/or fuel pump.
  8.  
  9. Clean all mounting surfaces.
  10.  
  11. Using a new gasket, install the fuel pump. Installation is the reverse of removal.
  12.  

TESTING



Pressure Test

See Figure 7

Click image to see an enlarged view

Fig. Fig. 7: Testing the fuel pump for the correct output pressure

  1. If leakage is not apparent, the following pressure test should be performed.
  2.  
  3. Insert a "Tee" fitting into the fuel line at the carburetor.
  4.  
  5. Connect a 6 in. piece of hose between the "Tee" fitting and a pressure gauge.
  6.  
  7. Vent the pump for a few seconds to allow the pump to operate at maximum capacity.
  8.  
  9. Connect a tachometer and start the engine. Allow the engine to run at idle speed. The fuel pump pressure should be 3.5-5.0 (6-cylinder) or 5.0-7.0 psi (V8s). When the engine is stopped, the pressure should return to zero very slowly. If it rapidly or instantly drops to zero, a leaky outlet valve is indicated.
  10.  

Volume Test
  1. Disconnect the fuel line from the carburetor. Place the end of the line in a container holding at least 1 quart.
  2.  
  3. The fuel pump should pump our 1 quart in 1 minute or less at 500 rpm.
  4.  

 
label.common.footer.alt.autozoneLogo