Centinel System – Repair Manual – 005-031   Fuel Pump Pulsation Damper

• Remove the integrated fuel system module. Refer to Procedure 005-073.

There are two pulsation dampers.

Remove the top two capscrews and fuel pulsation dampers.

There are three pulsation dampers.

Remove three torx screws, cover, and dampers.

Remove the final capscrew and remove the housing from the cover. Remove the steel diaphragm. Discard the o-rings. Inspect the nylon washer and discard if damaged.

Check for corrosion, wear, or cracks in the cover or the diaphragm. Replace all damaged parts.

To check the diaphragm for hidden cracks, drop it on a flat, hard surface. It must have a clear ring. If it produces a flat sound, replace the diaphragm.

Remove the housing from the cover. Remove the steel diaphragm. Discard the o-rings. Inspect the nylon washer and discard it if it is damaged.

Check for corrosion, wear, or cracks in the cover or the diaphragm. Replace the damaged parts.

To check the diaphragm for hidden cracks, drop it on a flat, hard surface. It must have a clear ring. If it produces a flat sound, replace the diaphragm.

Assemble the fuel pulsation damper with new o-rings, a new steel diaphragm, and a new nylon washer, if needed. Install the lower fuel pulsation damper capscrew.

Verify the seal (1) is in the groove of the fuel pulsation damper (2) and add Lubriplate™ to hold the seal in place.

Attach the fuel pulsation damper (2) with capscrews (3).

Assemble the fuel pulsation damper with new o-rings, a new steel diaphragm, and a new nylon washer, if needed. Install the lower fuel pulsation damper capscrew.

• Install the integrated fuel system module. Refer to Procedure 005-073.