2012 Jeep Wrangler JK Factory Service Manual 09 - Engine, 2.8L Diesel

Valve Timing

LOCKING ENGINE 90 DEGREES AFTER TDC

LOCKING ENGINE 90 DEGREES AFTER TDC

Special Tools: Click to display a list of tools used in this procedure

  1. Disconnect the negative battery cable.

    2.  
  2. Remove the upper (4) and lower (2) front covers (Refer to 09 - Engine/Valve Timing/COVER(S) , Engine Timing - Removal).

    3.  
  3. Rotate the engine until the 90° ATDC marks on the crankshaft timing belt drive sprocket and timing belt cover are aligned.

    4.  
  4. Remove the engine block plug (1) for the crankshaft locking tool. The crankshaft locking tool is installed in the high pressure injection pump side of the engine slightly rearward of the engine mount.

    5.  
  5. Install the Crankshaft Locking Tool VM.9992 into the high pressure pump side of the engine block. Make sure that the outer portion of the tool threads into the block and the bolt threads into the crankshaft. If the bolt does not thread into the crankshaft, the crankshaft is not at 90° ATDC. If necessary, realign the 90° ATDC marks on the crankshaft timing belt drive sprocket and timing belt cover.

    6.  

Camshaft Timing Procedure

Camshaft Timing Procedure

Special Tools: Click to display a list of tools used in this procedure



NOTE:

In order to validate camshaft timing, the cylinder head cover and timing belt should already have been removed.

CAUTION:

The camshaft dots time the camshafts to each other. Later in the procedure we will rotate the camshafts so they are timed to the crankshaft.

  1. Line up the camshaft gear dots.

    2.  
  2. Disconnect the camshaft position sensor harness connector.

    3.  
  3. Remove bolt (1) and the camshaft position sensor (3).

    4.  
  4. Remove the exhaust camshaft oil seal (1) to expose the camshaft reluctor.

    5.  
  5. Mark the camshaft tone wheel with a paint marker.

    CAUTION:

    Do not rotate the camshaft using the Camshaft Locking Tool . The tone wheel may spin on the camshaft. If the tone wheel is rotated on the camshaft, the camshaft must be replaced.



    NOTE:

    Starting in model year 2013, the exhaust camshaft reluctor is now bolted on requiring a change in the Camshaft Sprocket Alignment Tool VM.9991. The new Camshaft Sprocket Alignment Tool number is VM.9991–1. This tool can be used on older models.

    6.  
  6. Rotate the camshafts until the Camshaft Locking Tool VM.9991 can be installed.

    7.  
  7. Install the Camshaft Locking Tool VM.9991 .

    8.  
  8. Verify the camshafts are set correctly at 90° ATDC as illustrated.

    9.