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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1584 (5.7L Engine CNG - (Service Information) - 2500 Hd) >> Manifolds >> Manifold, Intake, CNG >> Removal >> Removal-CNG

Manifold, Intake, CNG: Removal: Removal-CNG

WARNING: This page is about a different car, the 2018 RAM 2500 HD and 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
GC0155436Courtesy of CHRYSLER GROUP, LLC
  1. Disconnect the intake air temperature (IAT) sensor electrical connector (2).
  2. Remove the clean air tube (1) from the air cleaner housing (3) and the throttle body.
  3. Disconnect the makeup air hose.
  4. Remove the air cleaner housing. Refer to BODY, AIR CLEANER, REMOVAL  .
  5. Perform the fuel pressure release and the CNG pressure release procedures Refer to FUEL SYSTEM PRESSURE RELEASE and CNG FUEL SYSTEM PRESSURE RELEASE .
    GC0087848Courtesy of CHRYSLER GROUP, LLC
  6. Disconnect the negative battery cable (1).
  7. Disconnect the CNG supply line connect fitting at the fuel rail.
    GC0155462Courtesy of CHRYSLER GROUP, LLC
  8. Disconnect the fuel rail sensor (2) at the CNG fuel rail (1).
    GC0088122Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Excessive fuel spillage onto the gaskets can cause gaskets to expand and dislodge from the gasket groove.

  9. Disconnect the fuel supply line quick connect fitting at the fuel rail (1) and plug the fuel supply line with a shipping cap to prevent spillage. Refer to appropriate service information .
    NOTE:

    The factory fuel injection electrical harness is numerically tagged (INJ 1, INJ 2, etc.) for injector position identification. If the harness was not tagged, note the electrical connector's location during removal.

  10. Disconnect the electrical connectors to all fuel injectors and position the fuel injector electrical harness aside.
  11. Remove the main engine electrical harness support strap at the rear of the intake manifold and position harness aside.
    GC0088123Courtesy of CHRYSLER GROUP, LLC
  12. Remove the A/C line P-Clip retaining bolt (1) from the throttle body bracket and remove the P-Clip (2).
  13. Secure the A/C line out of the way.
  14. Remove the generator. Refer to GENERATOR, REMOVAL .
  15. Remove the throttle body bracket retaining bolt from the intake manifold and remove the bracket.
  16. Disconnect the electrical connector at the throttle body and reposition the harness.
    Fig 1: Intake Manifold Retaining Bolt Removal & Tightening Sequence
    GC0155483Courtesy of CHRYSLER GROUP, LLC
  17. Using the sequence shown, remove the intake manifold retaining bolts.
    NOTE:

    Standard gasoline engine shown. CNG engine similar.

    GC0088125Courtesy of CHRYSLER GROUP, LLC
  18. Slide the intake manifold forward and disconnect both the manifold air pressure (MAP) sensor (1) and the short runner valve (SRV) connectors located at the rear of the intake manifold.
  19. Remove the intake manifold and throttle body as an assembly.
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