Cylinder Head - Removal
Cylinder Head
All cylinder heads
1. Remove the engine. For additional information, refer to Engine Engine - Removal.
2. Mount the engine on a suitable work stand.
3. Remove the Modular Engine Lift Bracket.
4. Disconnect the Crankshaft Position (CKP) sensor electrical connector and detach the wiring harness retainer.
5. Disconnect the RH Camshaft Position (CMP) sensor electrical connector.
6. NOTE: RH shown, LH similar.
Disconnect the RH and LH Variable Camshaft Timing (VCT) solenoid electrical connectors.
7. Detach the wiring harness retainers.
8. Remove the nut and the RH radio ignition interference capacitor.
9. Disconnect the Engine Oil Pressure (EOP) sensor electrical connector.
10. Disconnect the LH CMP sensor electrical connector and detach the wiring harness retainers.
11. Remove the nut and the cooling fan wiring harness bracket.
12. Remove the nut and detach the LH radio interference capacitor.
13. Detach the wiring harness retainers from the LH valve cover studs.
14. NOTE: RH shown, LH similar.
Disconnect the 4 RH and 4 LH ignition coil electrical connectors.
15. Detach the wiring harness retainers from the RH valve cover studs.
16. Disconnect the Cylinder Head Temperature (CHT) sensor electrical connector.
17. Disconnect the Knock Sensor (KS) electrical connector.
18. Detach the electrical connector and wiring harness retainers and remove the engine wiring harness.
19. NOTE: When reusing liquid or vapor tube connectors, make sure to use compressed air to remove any foreign material from the connector retaining clip area before separating from the tube.
Remove the breather tube from the RH valve cover.
- Disconnect the quick connect fittings.
- Push the connector toward the valve cover to release pressure.
- Push the release tab clockwise.
- Disconnect the quick connect fitting.
20. NOTE: When reusing liquid or vapor tube connectors, make sure to use compressed air to remove any foreign material from the connector retaining clip area before separating from the tube.
Remove the PCV tube from the LH valve cover.
- Disconnect the quick connect fittings.
- Push the connector toward the valve cover to release pressure.
- Push the release tab clockwise.
- Disconnect the quick connect fitting.
21. Remove and discard the oil filter.
22. NOTE: LH shown, RH similar.
Remove the 8 bolts and the 8 ignition coils.
23. Remove the bolt and position the oil level indicator aside.
24. 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 which make leak paths. Use a plastic scraping tool to remove all traces of old sealant.
NOTICE: Remove the valve cover carefully, or the Variable Camshaft Timing (VCT) solenoid may be damaged.
NOTE: The bolts are part of the valve cover and should not be removed.
Loosen the 10 bolts and remove the LH valve cover.
- Clean the valve cover mating surface of the cylinder head with silicone gasket remover and metal surface prep. Follow the directions on the packaging.
- Inspect the valve cover gasket. If the gasket is damaged, remove and discard the gasket. Clean the valve cover gasket groove with soap and water or a suitable solvent.
25. 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 which make leak paths. Use a plastic scraping tool to remove all traces of old sealant.
NOTICE: Remove the valve cover carefully, or the Variable Camshaft Timing (VCT) solenoid may be damaged.
NOTE: The bolts are part of the valve cover and should not be removed.
Loosen the 9 bolts and remove the RH valve cover.
- Clean the valve cover mating surface of the cylinder head with silicone gasket remover and metal surface prep. Follow the directions on the packaging.
- Inspect the valve cover gasket. If the gasket is damaged, remove and discard the gasket. Clean the valve cover gasket groove with soap and water or a suitable solvent.
26. Remove the 5 bolts, the coolant pump pulley and the RH side accessory drive belt idler pulley.
27. Remove and discard the crankshaft pulley bolt. Using the 3 Jaw Puller, remove the crankshaft pulley.
28. Using the Crankshaft Front Seal Remover, remove the crankshaft seal.
29. Remove the 4 oil pan-to-engine front cover bolts.
30. NOTE: Correct fastener location is essential for the assembly procedure. Record fastener location.
Remove the 15 engine front cover fasteners.
31. Remove the engine front cover from the cylinder block.
32. Remove the crankshaft sensor ring from the crankshaft.
33. Position the crankshaft keyway at the 12 o'clock position.
34. NOTE: If the camshaft lobes are not exactly positioned as shown, the crankshaft will require one full additional rotation to the 12 o'clock position.
The No. 1 cylinder camshaft exhaust lobe must be coming up on the exhaust stroke. Verify by noting the position of the 2 intake lobes and the exhaust lobe on the No. 1 cylinder.
35. 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 only the 3 roller followers shown in the illustration from the RH cylinder head.
36. NOTICE: Do not allow the valve keepers to fall off the valve or the valve may drop into the cylinder.
NOTE: It may be necessary to push the valve down while compressing the spring.
Using the Valve Spring Compressor, remove the 3 roller followers designated in the previous step from the RH cylinder head.
37. 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 only the 3 roller followers shown in the illustration from the LH cylinder head.
38. NOTICE: Do not allow the valve keepers to fall off the valve or the valve may drop into the cylinder.
NOTE: It may be necessary to push the valve down while compressing the spring.
Using the Valve Spring Compressor, remove the 3 roller followers designated in the previous step from the LH cylinder head.
39. NOTE: The crankshaft cannot be moved past the 6 o'clock position once set.
Rotate the crankshaft clockwise and position the crankshaft keyway at the 6 o'clock position.
40. Remove the 2 bolts, the LH timing chain tensioner and tensioner arm.
41. Remove the 2 bolts, the RH timing chain tensioner and tensioner arm.
42. Remove the RH and LH timing chains and the crankshaft sprocket.
- Remove the RH timing chain from the camshaft sprocket.
- Remove the RH timing chain from the crankshaft sprocket.
- Remove the LH timing chain from the camshaft sprocket.
- Remove the LH timing chain and crankshaft sprocket.
43. NOTE: RH shown, LH similar.
Remove the 4 bolts and the LH and RH timing chain guides.
44. NOTICE: Damage to the camshaft phaser sprocket assembly will occur if mishandled or used as a lifting or leveraging device.
NOTICE: Only use hand tools to remove the camshaft phaser sprocket assembly or damage may occur to the camshaft or camshaft phaser unit.
NOTICE: Damage to the camshaft phaser sprocket assembly will occur if mishandled or used as a lifting or leveraging device.
Using the Camshaft Phaser Sprocket Holding Tool, remove the bolt and the RH camshaft phaser sprocket assembly.
- Discard the camshaft phaser sprocket bolt.
45. NOTICE: Damage to the camshaft phaser sprocket assembly will occur if mishandled or used as a lifting or leveraging device.
NOTICE: Only use hand tools to remove the camshaft phaser sprocket assembly or damage may occur to the camshaft or camshaft phaser unit.
NOTICE: Damage to the camshaft phaser sprocket assembly will occur if mishandled or used as a lifting or leveraging device.
Using the Camshaft Phaser Sprocket Holding Tool, remove the bolt and the LH camshaft phaser sprocket assembly.
- Discard the camshaft phaser sprocket bolt.
46. NOTICE: Remove the front thrust camshaft bearing cap straight upward from the bearing towers or the bearing cap may be damaged from side loading.
Remove the 2 bolts and the RH cylinder head camshaft front bearing cap.
47. NOTICE: The camshaft bearing caps must be installed in their original locations. Record camshaft bearing cap locations. Failure to follow these instructions may result in engine damage.
Remove the 8 bolts in the sequence shown and remove the RH cylinder head camshaft bearing caps.
48. Clean and inspect the RH camshaft bearing caps.
- The camshaft front thrust bearing cap contains an oil metering groove. Make sure the groove is free of foreign material.
49. Remove the RH camshaft.
50. NOTICE: Remove the front thrust camshaft bearing cap straight upward from the bearing towers or the bearing cap may be damaged from side loading.
Remove the 2 bolts and the LH cylinder head camshaft front bearing cap.
51. NOTICE: The camshaft bearing caps must be installed in their original locations. Record camshaft bearing cap locations. Failure to follow these instructions may result in engine damage.
Remove the 8 bolts in the sequence shown and remove the LH cylinder head camshaft bearing caps.
52. Clean and inspect the LH camshaft bearing caps.
- The camshaft front thrust bearing cap contains an oil metering groove. Make sure the groove is free of foreign material.
53. Remove the LH camshaft.
54. 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 all of the remaining roller followers from the cylinder heads.
LH cylinder head
55. 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 hydraulic lash adjusters from the LH cylinder head.
56. Install the Cylinder Head Remover/Installer onto the LH cylinder head.
57. Remove the 3 bolts and the LH exhaust manifold heat shield.
58. Remove the 8 nuts, the LH exhaust manifold and the 2 gaskets.
- Discard the nuts and the gaskets.
59. Remove and discard the 8 LH exhaust manifold studs.
RH cylinder head
60. 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 hydraulic lash adjusters from the RH cylinder heads.
61. Install the Cylinder Head Remover/Installer onto the RH cylinder head.
62. Remove the 3 bolts and the RH exhaust manifold heat shield.
63. Remove the 8 nuts, the RH exhaust manifold and the 2 gaskets.
- Discard the nuts and the gaskets.
64. Remove and discard the 8 RH exhaust manifold studs.
65. Detach the Knock Sensor (KS) electrical connector retainer.
66. Remove the nut and the ground strap.
67. Remove the stud bolt and the heater supply tube and hoses as an assembly.
- Discard the O-ring seals.
All cylinder heads
68. NOTICE: The cylinder head must be cool before removing it from the engine. Cylinder head warpage may result if a warm or hot cylinder head is removed.
NOTICE: Place clean shop towels over exposed engine cavities. Carefully remove the towels so foreign material is not dropped into the engine.
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.
NOTICE: Aluminum surfaces are soft and can be scratched easily. Never place the cylinder head gasket surface, unprotected, on a bench surface, or the cylinder head may be damaged.
NOTE: The cylinder head bolts must be discarded and new bolts must be installed. They are a tighten-to-yield design and cannot be reused.
NOTE: RH shown, LH similar.
Remove the 20 bolts and the cylinder heads.
- Discard the cylinder head gaskets.
- Discard the cylinder head bolts.
69. 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 head 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.
70. NOTE: LH shown, RH similar.
Support the cylinder heads on a bench with the head gasket side up. Check the cylinder head distortion and the cylinder block distortion, paying particular attention to the oil pressure feed area. For additional information, refer to Engine.
