Overhaul

Fuel Conditioning Module - 6.4L Diesel













Disassembly

1. NOTICE: The fuel conditioning module that is used with the 6.4L diesel engine has a brown pump cover. Installing a fuel conditioning module with a black cover may result in damage to the high-pressure fuel system.

Remove the fuel filter cover and drain the fuel from the housing.

- Remove and discard the O-ring seal.

2. Remove the fuel filter and discard.

3. If necessary, remove the bolt and the drain valve cover.

4. Remove the 4 bolts and the manifold cover.
- Remove and discard the press-in-place gasket.

5. Remove the return valve assembly.

6. Remove the 3 bolts and the Fuel Pump (FP).
- Remove and discard the O-ring seals.

7. Remove the 4 bolts and the fuel conditioning module mounting bracket.
- Inspect the fuel conditioning module mounting bracket rubber grommets for damage. If any fuel conditioning module mounting bracket rubber grommets are damaged, install a new grommet(s).

Assembly

1. Install the fuel conditioning mounting bracket and 4 bolts.
- Tighten to 5 Nm (44 lb-in).

2. Install new O-ring seals on the FP and lubricate with clean engine oil.

3. Install the FP and 3 bolts.
- Tighten to 5 Nm (44 lb-in).

4. Install the return valve assembly.

5. Install a new press-in-place gasket in the fuel manifold.

6. If removed, install the drain valve cover and bolt.
- Tighten to 5 Nm (44 lb-in).

7. Install the manifold cover and 4 bolts.
- Tighten to 5 Nm (44 lb-in).

8. Lubricate the O-ring seal with clean engine oil and install the fuel filter.

9. Install a new O-ring seal on the fuel filter cover and lubricate with clean engine oil.

10. NOTICE: The fuel conditioning module that is used with the 6.4L diesel engine has a brown pump cover. Installing a fuel conditioning module with a black cover may result in damage to the high-pressure fuel system.

Install the fuel filter cover.

- Tighten to 25 Nm (18 lb-ft).