Cylinder Head — RH

NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces that enters the oil passages, coolant passages or the oil pan, can cause engine failure.

NOTE: If the cylinder head is replaced, a new secondary timing chain tensioner will need to be installed.

1. Remove the RH camshafts. For additional information, refer to Camshaft in this section.

2. If equipped, remove the block heater heat shield.

3. If equipped, disconnect the block heater electrical connector.
   • Remove the block heater wiring harness from the engine.

4. Disconnect the 2 RH Camshaft Position Camshaft Position (CMP) sensor electrical connectors.

5. Remove the 2 bolts and the 2 CMP sensors.

6. Remove the bolt and the ground cable from the RH cylinder.

7. Remove the LH cylinder block drain plug.
   • Allow coolant to drain from the cylinder block.

8. Remove the 4 bolts and the RH catalytic converter heat shield.

9. Remove the 6 nuts and the RH catalytic converter manifold.
   • Discard the nuts and catalytic converter gasket.

10. Clean and inspect the RH catalytic converter manifold. For additional information, refer to Section 303-00 .

11. Remove and discard the 6 RH exhaust manifold studs.

12. Remove the RH cylinder block drain plug or, if equipped, the block heater.
    • Allow coolant to drain from the cylinder block.

13. NOTICE: Do not use power tools to remove the bolt or damage to the RH primary timing chain guide may occur.

    Remove the bolt and the RH primary timing chain guide.

14. Remove the 2 bolts and the engine lifting eye.

15. NOTE: Index-mark the location of the bracket on the cylinder head for installation.

    Remove the bolt and the upper intake manifold bracket.

16. Remove the 2 thermostat housing-to-lower intake manifold bolts.

17. NOTICE: If the engine is repaired or replaced because of upper engine failure, typically including valve or piston damage, check the intake manifold for metal debris. If metal debris is found, install a new intake manifold. Failure to follow these instructions can result in engine damage.

    Remove the 10 bolts and the lower intake manifold.
    • Remove and discard the intake manifold and thermostat housing gaskets.
    • Clean and inspect all sealing surfaces.

18. Disconnect and remove the CHT sensor jumper harness.

19. NOTE: If the components are to be reinstalled, they must be installed in the same positions. Mark the components for installation into their original locations.

    Remove the valve tappets from the cylinder head.

20. Inspect the valve tappets. For additional information, refer to Section 303-00 .

21. Remove and discard the M6 bolt.

22. NOTICE: Place clean shop towels over exposed engine cavities. Carefully remove the towels so foreign material is not dropped into the engine. Any foreign material (including any material created while cleaning gasket surfaces) that enters the oil passages or the oil pan, may cause engine failure.

    NOTICE: Aluminum surfaces are soft and can be scratched easily. Never place the cylinder head gasket surface, unprotected, on a bench surface.

    NOTE: The cylinder head bolts must be discarded and new bolts must be installed. They are tighten-to-yield designed and cannot be reused.

    Remove and discard the 8 bolts from the cylinder head.
    • Remove the cylinder head.
    • Discard the cylinder head gasket.

23. NOTICE: Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These tools cause scratches and gouges that make leak paths. Use a plastic scraping tool to remove all traces of the head gasket.

    NOTE: Observe all warnings or cautions and follow all application directions contained on the packaging of the silicone gasket remover and the metal surface prep.

    NOTE: If there is no residual gasket material present, metal surface prep can be used to clean and prepare the surfaces.

    Clean the cylinder head-to-cylinder block mating surfaces of both the cylinder heads and the cylinder block in the following sequence.
    1. Remove any large deposits of silicone or gasket material with a plastic scraper.
    2. Apply silicone gasket remover, following package directions, and allow to set for several minutes.
    3. Remove the silicone gasket remover with a plastic scraper. A second application of silicone gasket remover may be required if residual traces of silicone or gasket material remain.
    4. Apply metal surface prep, following package directions, to remove any remaining traces of oil or coolant and to prepare the surfaces to bond with the new gasket. Do not attempt to make the metal shiny. Some staining of the metal surfaces is normal.

24. Support the cylinder head on a bench with the head gasket side up. Check the cylinder head distortion and the cylinder block distortion. For additional information, refer to Section 303-00 .