2014 Jeep Wrangler JK Factory Service Manual 09 - Engine, 2.8L Diesel

BEARING(S), Crankshaft, Main

REMOVAL

  1. Remove the balance shaft assembly (Refer to 09 - Engine/Engine Block/MODULE, Balance Shaft - Removal) .

    NOTE:

    Bearing caps (2–6) are not interchangeable and are marked to ensure according to their locations (2–6) in the block (1). Upper and lower bearing halves are NOT interchangeable, and must be installed facing in the correct direction.


    2.  
  2. Identify bearing cap locations (2–6) before removal.

    3.  
  3. Remove the bearing caps (1) one at a time, and if possible, replace the crankshaft bearings (3) one at a time. Carefully rotate upper half of bearing from between the carrier and the crankshaft (4). If the upper half of the bearing does not easily slide out of position, the crankshaft must be removed for further inspection (Refer to 09 - Engine/Engine Block/CRANKSHAFT - Removal) .

    4.  

INSTALLATION



NOTE:

The crankshaft cannot be machined, if badly worn or scored it must be replaced.


  1. Locate the crankshaft journal letter class (1) stamp on the crankshaft weight.

    2.  
  2. Locate the engine block crankshaft journal letter class stamp on the engine block (1) besides the water pump seat.

    3.  
  3. To determine the correct crankshaft journal size, each cylinder block seat diameter letter class must be matched with the crankshaft main journal diameter letter class. Both letter classes stamped on the cylinder block as well as on the crankshaft weight are in a progressive order starting from the front of the engine. The first letter corresponds to the first cylinder, the second to the second, etc. Use the crankshaft bearing selection chart to determine the half shell color. (Refer to 09 - Engine/Engine Block - Standard Procedure) .

    4.  
  4. When installing the thrust bearings (1) make sure the oil discharge groves (2) face towards the crankshaft.

    5.  
  5. If the crankshaft was removed to install the bearings, install the crankshaft (Refer to 09 - Engine/Engine Block/CRANKSHAFT - Installation) .

    6.  
  6. Install the balance shaft assembly (Refer to 09 - Engine/Engine Block/MODULE, Balance Shaft - Installation) .

    7.