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Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (2.4L Engine (Service Information)) >> Cylinder Head >> Spring(S), Valve >> Removal >> On Vehicle

On Vehicle

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

The intake and exhaust springs are NOT interchangeable. Make the springs accordingly for installation. Correctly identify the part numbers for new springs being installed.

  1. Remove the variable valve actuator assembly. Refer to ASSEMBLY, VARIABLE VALVE ACTUATION, REMOVAL .
  2. Remove the exhaust camshaft. Refer to REMOVAL  .
    NOTE:

    If the rocker arms are to be reused, identify their positions so that they can be reassembled into their original locations.

  3. Remove the rocker arm(s). Refer to REMOVAL  .
  4. Install the (special tool #10224, Adapter, Valve Spring) (2) on the (special tool #MD998772A, Compressor, Valve Spring) (1).
    GC0156090Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Number 3 cylinder exhaust valve spring compression shown, all other valves similar.

  5. Remove the spark plug. Refer to SPARK PLUG, REMOVAL .
  6. Install the (special tool #MD998772A, Compressor, Valve Spring) (1) onto the cylinder head.
  7. Install a spark plug adapter attached to the (special tool #2049200090, Regulator, Pressure Test) (2). Pressurize the cylinder being serviced to 620.5 - 689 kPa (90 - 100 psi) to hold the valves in place.
    GC0155734Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Number 3 cylinder exhaust valve spring compression shown, all other valves similar.

    CAUTION:

    Air pressure must be maintained as long as the valve springs are removed to prevent the valves from dropping into the cylinders.

  8. Using the (special tool #10224, Adapter, Valve Spring) (2), compress valve spring (4) and remove valve retaining locks (3).
    GC0156007Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    The intake and exhaust springs are NOT interchangeable. Make the springs accordingly for installation. Correctly identify the part numbers for new springs being installed.

    NOTE:

    If the springs are to be reused, identify their positions so that they can be reassembled into their original locations.

    NOTE:

    Number 2 cylinder exhaust valve spring shown, all other valve springs similar.

  9. Release the valve spring compression and remove the valve spring retainer (1) and valve spring (2).
  10. If required, remove the valve guide seal. Refer to REMOVAL  .
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