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Home >> Jeep >> 2018 >> Grand Cherokee Trackhawk >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (6.4L Engine (Service Information)) >> Engine Block >> Rod, Piston And Connecting >> Installation
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Rod, Piston And Connecting: Installation

WARNING: This page is about a different variant/trim than selected.
CAUTION:

If the engine encounters a catastrophic failure, the engine oil cooler and lines must be replaced or damage to the new engine or components could result.

NOTE:

Before reinstalling used rings or installing new rings, the ring clearances must be checked.

NOTE:

Make sure the piston ring grooves are clean and free of nicks and burrs.

  1. Check piston ring clearance. Refer to STANDARD PROCEDURE  .
  2. Before installing piston and connecting rod assemblies into the bore, install the piston rings. Refer to STANDARD PROCEDURE  .
  3. Immerse the piston head and rings in clean engine oil and position a ring compressor over the piston and rings and tighten the ring compressor. Make sure the position of rings do not change during this operation. 
    GC0094865Courtesy of CHRYSLER GROUP, LLC
  4. The pistons are marked on the piston pin bore surface with an raised "F" or arrow on top of piston indicating installation position. This mark must be pointing toward the front of the engine on both cylinder banks.
  5. Wipe the cylinder bore clean and lubricate with clean engine oil.
  6. Rotate the crankshaft until the connecting rod journal is centered with the cylinder bore.
  7. Insert the piston and rod assembly into the cylinder bore and carefully position the connecting rod over the crankshaft journal.
  8. Tap the piston down in cylinder bore using a hammer handle. While at the same time, guide the connecting rod into position on crankshaft rod journal.
  9. Perform the measure bearing clearance procedure. Refer to STANDARD PROCEDURE  .
    GC0088094Courtesy of CHRYSLER GROUP, LLC
  10. Wipe the connecting rod cap (1) clean and lubricate with clean engine oil and install the bearing (3).
    NOTE:

    The connecting rods and bearing caps are not interchangeable, line up the previously marked bearing caps and connecting rods to ensure assembly to their original location.

  11. Lubricate the bearing surfaces with clean engine oil and position the rod cap onto the connecting rod.
    CAUTION:

    When installing the connecting rods, make sure the wide side of the connecting rod faces the crankshaft and the narrow sides face each other.

    CAUTION:

    Always replace the connecting rod bolts whenever they are loosened or removed.

    GC0081843Courtesy of CHRYSLER GROUP, LLC
  12. Verify the connecting rods are properly installed, the wide side (1) of the connecting rod is facing towards the crankshaft and the narrow sides (2) of the connecting rods face each other.
  13. Lubricate the new rod cap bolts with clean engine oil, install and tighten to the proper specifications. Refer to TORQUE SPECIFICATIONS  .
    CAUTION:

    When removing and installing the pistons and connecting rods, do not damage the piston oil cooler jets. If the jets are bent, engine damage may occur.

    GC0080329Courtesy of CHRYSLER GROUP, LLC
  14. Position the piston oil cooler jet(s) (1).
  15. Install the piston oil cooler jet retaining bolt(s) (2) and tighten to proper specifications. Refer to TORQUE SPECIFICATIONS  .
  16. Install the oil pan and oil pump pickup tube and oil pan. Refer to INSTALLATION .
  17. Install the cylinder head(s). Refer to INSTALLATION  .
  18. Connect the negative battery cable.
  19. Start the engine and check for leaks.
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