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Home >> Jeep >> 2021 >> Renegade Limited >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> 1.3L Engine (Service Information) >> Cylinder Head >> Disassembly And Assembly >> Overhaul

Disassembly And Assembly: Overhaul

DISASSEMBLY 

  1. Remove the cylinder head. Refer to CYLINDER HEAD, REMOVAL AND INSTALLATION  .
    GC0208110Courtesy of CHRYSLER GROUP, LLC
  2. Install the Cylinder Head Overhaul Support 1860470000 (1b) to the turbocharger mounting studs on the cylinder head (1a).
    GC0208233Courtesy of CHRYSLER GROUP, LLC
  3. Remove the bolts (1a) and the thermostat (1b) with O-ring.
    GC0208232Courtesy of CHRYSLER GROUP, LLC
  4. Remove the bolt (1a) and the camshaft position (CMP) sensor heat shield (1b).
    GC0208231Courtesy of CHRYSLER GROUP, LLC
  5. Remove the CMP sensor (2).
  6. Remove the Multiair actuator oil supply filter (1).
    GC0208230Courtesy of CHRYSLER GROUP, LLC
  7. Remove the bolts (1a) and remove the high pressure fuel pump (1b).
    GC0208109Courtesy of CHRYSLER GROUP, LLC
  8. Install the 2032400091 valve retaining tool (1).
    GC0208108Courtesy of CHRYSLER GROUP, LLC
  9. Compress the valve springs using 1860790000, 2000026800 (1a), 1860788000 (1b) and remove the valve spring retainer locks (1c).
    GC0208229Courtesy of CHRYSLER GROUP, LLC
  10. Remove the valve spring retainers (1).
  11. Remove the valve springs (2).
    GC0208228Courtesy of CHRYSLER GROUP, LLC
  12. Use the 1870894000 tool (1a) to remove the valve guide seals (2b) from the valve guides.
  13. Remove the tools from the cylinder head.
  14. Remove the intake and exhaust valves.
  15. Remove deposits and clean the valve seats and ports.
  16. Clean any gasket residue from the lower cylinder head surface.
  17. Check the flatness of the cylinder head surface. Refer to TECHNICAL SPECIFICATIONS  .
  18. If necessary, refinish the lower cylinder head surface; 0.1 mm of material can be removed from the minimum cylinder head height. Refer to TECHNICAL SPECIFICATIONS  .
    GC0208235Courtesy of CHRYSLER GROUP, LLC
  19. Check that the resurfacing has not changed any of the combustion chambers in the areas shown in the figure (1); otherwise the cylinder head must be replaced.
    GC0208234Courtesy of CHRYSLER GROUP, LLC
  20. Also check all the combustion chamber volumes as described below:
    1. Temporarily install the valves and spark plugs. Fill a graduated burette (1) with a known amount of engine oil.
    2. Rest a glass plate (2) on the cylinder head with holes corresponding to the combustion chambers.
    3. Fill the combustion chamber completely (3), taking care not to pour oil outside of the combustion chamber.
  21. Wait about 10 minutes to allow the oil to settle.
  22. Measure the amount of oil remaining in the burette and then calculate the difference between this and the amount of oil used initially with the burette full. The difference is the volume of the combustion chamber.
  23. Check that this value is within the specified values; if it is not, replace the cylinder head. Refer to TECHNICAL SPECIFICATIONS  .
  24. Check that the valve stem does not show signs of grooves or seizing.
  25. Check that the diameter of the valve stems is within the specified values; if not, replace the worn valves. Refer to TECHNICAL SPECIFICATIONS  .
  26. Check that the diameter of the valve head is within the specified values; if not, replace the valves. Refer to TECHNICAL SPECIFICATIONS  .
  27. Check that the inner diameter of the valve guide and the clearance between it and the valve are within the specified values, otherwise replace the valve guide. Refer to TECHNICAL SPECIFICATIONS  .
  28. If required, replace the valve guides

    Refer to VALVE GUIDES, REMOVAL AND INSTALLATION  .

  29. Using a suitable tool, check that the valve springs are within specifications; if not, replace the worn springs. Refer to TECHNICAL SPECIFICATIONS  .

ASSEMBLY 

  1. Use the 1860993000 tool to fit the new valve guide seals on the valve guides.
  2. Install the valves, springs, spring retainers and retainer locks using the same equipment as for the disassembly.
  3. Install the thermostat with a NEW  O-ring and tighten the bolts to the proper torque specification. Refer to TORQUE SPECIFICATIONS .
  4. Install the high pressure fuel pump complete with roller tappet onto the cylinder head and tighten the bolts to the proper torque specification. Refer to TORQUE SPECIFICATIONS .
  5. Install and securely tighten the Multiair actuator oil supply filter.
  6. Install the camshaft position (CMP) sensor with heat shield and securely tighten the bolt.
  7. Remove the cylinder head from the Cylinder Head Overhaul Support 1860470000.
  8. Check that the camshaft journals and the cam lift are within the specified values. Refer to TECHNICAL SPECIFICATIONS  .
  9. Install the cylinder head. Refer to CYLINDER HEAD, REMOVAL AND INSTALLATION  .
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