Cylinder Head - LH: Removal

1. 1.
   
   Remove the LH camshafts. Refer to Camshaft .

1. 2.
   
   If equipped, remove the block heater heat shield.

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1. 3.
   
   If equipped, disconnect the block heater electrical connector.
   • Remove the block heater wiring harness from the engine.

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1. 4.
   
   Disconnect the 2 LH CMP sensor electrical connectors.

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1. 5.
   
   Remove the 2 bolts and the 2 CMP sensors.

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1. 6.
   
   Remove the wiring harness retainer from the rear of the LH cylinder head.

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1. 7.
   
   Disconnect the 2 A/C compressor electrical connectors.
   • Detach the A/C wiring harness retainer.

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1. 8.
   
   Remove the nut, 2 stud bolts and the A/C compressor.

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1. 9.
   
   Disconnect the generator electrical connector and position the generator B+ cable cover aside.

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1. 10.
   
   Remove the nut and disconnect the generator B+ cable.

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1. 11.
   
   Remove the nut, bolt and the generator.
   • Remove the generator stud.

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1. 12.
   
   Disconnect the EOP switch electrical connector and the wiring harness pin-type retainer.

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NOTE: If necessary, lubricate the HO2S with penetrating and lock lubricant to assist in removal.
1. 13.
   Remove the LH HO2S.

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1. 14.
   
   Remove the 3 bolts and the LH exhaust heat shield.

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1. 15.
   
   Remove the 6 nuts and the LH catalytic converter.
   • Discard the nuts and the gasket.

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1. 16.
   
   Clean and inspect the catalytic converter flange. REFER to Engine System General Information .

1. 17.
   
   Remove and discard the 6 LH exhaust manifold studs.

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1. 18.
   
   Remove the LH cylinder block drain plug.
   • Allow coolant to drain from the cylinder block.

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1. 19.
   
   Remove the RH cylinder block drain plug or, if equipped, the block heater.
   • Allow coolant to drain from the cylinder block.

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1. 20.
   
   Remove the 2 thermostat housing-to-lower intake manifold bolts.

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NOTE: 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.
1. 21.
   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.

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NOTE: Do not use power tools to remove the bolt or damage to the LH primary timing chain guide may occur.
1. 22.
   Remove the bolt and the LH primary timing chain guide.

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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.
1. 23.
   Remove the valve tappets from the cylinder head.

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1. 24.
   
   Inspect the valve tappets. REFER to Engine System General Information .

1. 25.
   
   Remove and discard the M6 bolt.

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NOTE: The cylinder head bolts must be discarded and new bolts must be installed. They are tighten-to-yield designed and cannot be reused.
NOTE: Aluminum surfaces are soft and can be scratched easily. Never place the cylinder head gasket surface, unprotected, on a bench surface.
NOTE: 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.
1. 26.
   Remove and discard the 8 bolts from the cylinder head.
   • Remove the cylinder head.
   • Discard the cylinder head gasket.

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NOTE: If there is no residual gasket material present, metal surface prep can be used to clean and prepare the surfaces.
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: 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.
1. 27.
   Clean the cylinder head-to-cylinder block mating surfaces of both the cylinder heads and the cylinder block in the following sequence.
   • Remove any large deposits of silicone or gasket material with a plastic scraper.
   • Apply silicone gasket remover, following package directions, and allow to set for several minutes.
   • 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.
   • 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.

1. 28.
   
   Support the cylinder head on a bench with the head gasket side up. Check the cylinder head distortion and the cylinder block distortion. REFER to Engine System General Information - Cylinder Head Distortion and REFER to Engine System General Information - Cylinder Block Distortion. .