Left Cylinder Head
Left Cylinder Head
Special tools, testers and auxiliary items required
• Tensioner Pin (8514)
• Camshaft Phaser Lock (10202)
Removing
The magnetic timing wheels (1) must not come in contact with magnets (pickup tools, trays, etc.) or any other strong magnetic field. This will destroy the timing wheels ability to correctly relay camshaft position to the camshaft position sensor.
- Perform the fuel pressure release procedure. Refer to => [ Fuel System Pressure Release Procedure ] Service and Repair.
- Disconnect the negative battery cable.
- Raise and support the vehicle.
- Remove the belly pan.
- Drain cooling system. Refer to => [ Cooling System Draining and Filling ] Cooling System Draining and Filling.
- Drain the engine oil.
- Lower the vehicle.
- Remove the engine cover (1).
- Recover the refrigerant from the refrigerant system.
- Remove the air cleaner body (1). Refer to => [ Air Cleaner Housing ] Air Cleaner Housing.
- Remove the resonator. Refer to => [ Air Cleaner Resonator ] Service and Repair.
- Disconnect the heater core return hose (1).
- Disconnect the left upstream oxygen sensor connector (1) from the main wire harness.
- Disengage two upper wire harness retainers (2) from the intake manifold support brackets.
- Disengage two lower wire harness retainers (3) from the intake manifold support brackets.
- Remove the nut (2), bolt (3) and the heater core return tube (1).
- Remove the bolt (2) and the oil level indicator tube (1).
- Remove the upper and lower intake manifolds (2) and insulator. Refer to => [ Lower Intake Manifold ] Lower Intake Manifold.
- Remove the bolts (2) and remove the LH upper intake manifold support brackets (1).
- Remove the accessory drive belt (7). Refer to => [ Accessory Drive Belt ] Accessory Drive Belt.
- Remove the generator (2).
- Remove the A/C compressor (1) from the engine compartment.
- Disconnect the ignition coil capacitor electrical connector.
- Disconnect the Engine Coolant Temperature (ECT) sensor connector.
- Disconnect the main harness from the engine injection/ignition harness (1) at the rear of the left cylinder head.
- Disconnect the main harness from the engine oil pressure/temperature harness (2) at the rear of the left cylinder head.
- Remove the spark plugs. Refer to => [ Spark Plug ] Service and Repair.
- Remove the cylinder head covers, lower and upper oil pans, crankshaft vibration damper and engine timing cover. Refer to => [ Engine Timing Cover ] Engine Timing Cover
When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve and/or piston damage.
- Rotate the crankshaft CW to place the number one piston at TDC on the exhaust stroke by aligning the dimple (4) on the crankshaft with the block/bearing cap junction (5). The left side cam phaser arrows (2) should point toward each other and be parallel to the valve cover sealing surface (3). The right side cam phaser arrows (7) should point away from each other and the scribe lines (9) should be parallel to the valve cover sealing surface (8).
Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.
- Mark the direction of rotation on the timing chain using a paint pen or equivalent to aid in reassembly.
When the timing chains are removed and the cylinder heads are still installed, DO NOT rotate the camshafts or crankshaft without first locating the proper crankshaft position. Failure to do so will result in valve and/or piston damage.
- Reset the LH cam chain tensioner by lifting the pawl (1), pushing back the piston (2) and installing tensioner pin (8514) (3). Refer to => [ Resetting Left Cam Chain Tensioner ] Resetting Left Cam Chain Tensioner.
• Minor rotation of a camshaft (a few degrees) may be required to install the camshaft phaser lock.
- Install the LH camshaft phaser lock (10202) (4).
- Loosen both the intake oil control valve (6) and exhaust oil control valve (2).
- Remove the LH camshaft phaser lock (10202) (4).
- Remove the oil control valve (2) from the left side exhaust cam phaser and pull the phaser off of the camshaft.
- Remove the oil control valve (6) from the left side intake cam phaser and pull the phaser off of the camshaft.
- Remove the LH cam chain tensioner arm (1).
- Remove two T30 bolts (6) and the LH cam chain tensioner (5).
- Remove two T30 bolts (4) and the LH cam chain guide (2).
- Remove the left camshafts. Refer to => [ Left Camshafts ] Left Camshafts
• If the rocker arms are to be reused, identify their positions so that they can be reassembled into their original locations.
- Remove the rocker arms. Refer to => [ Rocker Arm ] Service and Repair.
• If the hydraulic lifters are to be reused, identify their positions so that they can be reassembled into their original locations.
- If required, remove the hydraulic lifters. Refer to => [ Hydraulic Lifter ] Service and Repair.
- Using the sequence shown, remove the cylinder head retaining bolts.
• Right head gasket shown, left head gasket similar.
The multi-layered steel head gaskets have very sharp edges that could cause personal injury if not handled carefully.
• The head gasket (1) crimps the locating dowels (2) and the dowels may pull out of the engine block when the head gasket is removed.
Do not lay the cylinder head on its gasket sealing surface, due to the design of the cylinder head gasket, any distortion to the cylinder head sealing surface may prevent the gasket from properly sealing resulting in leaks.
- Remove the cylinder head and gasket (1). Discard the gasket.
- If required, remove the engine coolant temperature (ECT) sensor (4).
- If required, remove the bolt (2) and the ignition coil capacitor (1).
- If required, remove the bolt (3) and the engine wire harness retainer bracket (5).
Installing
The magnetic timing wheels (1) must not come in contact with magnets (pickup tools, trays, etc.) or any other strong magnetic field. This will destroy the timing wheels ability to correctly relay camshaft position to the camshaft position sensor.
- If removed, install the Engine Coolant Temperature (ECT) sensor (4) and tighten to 11 Nm (97 in. lbs.).
- If removed, install the ignition coil capacitor (1) with a M6 bolt (2) tightened to 10 Nm (89 in. lbs.).
- If removed, install the engine wire harness retainer bracket (5) with a T30 bolt (3) tightened to 12 Nm (106 in. lbs.).
The cylinder head bolts are tightened using a torque plus angle procedure. The bolts must be examined BEFORE reuse. If the threads are necked down the bolts must be replaced.
- Check cylinder head bolts for necking by holding a scale or straight edge against the threads. If all the threads do not contact the scale (2) the bolt must be replaced.
• Right head gasket shown, left head gasket similar.
When cleaning cylinder head and cylinder block surfaces, DO NOT use a metal scraper because the surfaces could be cut or ground. Use ONLY a wooden or plastic scraper.
- Clean and prepare the gasket sealing surfaces of the cylinder head and block. Refer to => [ Engine Gasket Surface Preparation ] Engine Gasket Surface Preparation.
Non-compressible debris such as oil, coolant or RTV sealants that are not removed from bolt holes can cause the aluminum casting to crack when tightening the bolts.
- Clean out the cylinder head bolt holes in the engine block.
The multi-layered steel head gaskets have very sharp edges that could cause personal injury if not handled carefully.
The cylinder head gaskets are not interchangeable between the left and right cylinder heads and are clearly marked with "R" for right and "L" for left.
- Position the new cylinder head gasket (1) on the locating dowels (2).
- Position the cylinder head onto the cylinder block. Make sure the cylinder head seats fully over the locating dowels.
• Do not apply any additional oil to the bolt threads.
- Install the eight head bolts finger tight.
- Tighten the cylinder head bolts in the sequence shown, following this 9 step torque plus angle method. Tighten according to the following torque values:
• Step 1: All to 30 Nm (22 ft. lbs.)
• Step 2: All to 45 Nm (33 ft. lbs.)
• Step 3: All + 75° Turn Do not use a torque wrench for this step.
• Step 4: (2) and (3) Additional + 50° Turn Do not use a torque wrench for this step.
• Step 5: Loosen all fasteners in reverse of sequence shown
• Step 6: All to 30 Nm (22 ft. lbs.)
• Step 7: All to 45 Nm (33 ft. lbs.)
• Step 8: All + 60° Turn Do not use a torque wrench for this step.
• Step 9: All + 70° Turn Do not use a torque wrench for this step.
• If the hydraulic lifters are being reused, reassemble them into their original locations.
- If removed, install the hydraulic lifters. Refer to => [ Hydraulic Lifter ] Service and Repair.
• If the rocker arms are being reused, reassemble them into their original locations.
- Install the rocker arms and camshafts. Refer to => [ Rocker Arm ] Service and Repair and => [ Left Camshafts ] Left Camshafts.
- Rotate the camshafts CW to TDC by positioning the alignment holes (1) vertically.
- Install the LH cam chain guide (2) with two bolts (4). Tighten the T30 bolts (4) to 12 Nm (106 in. lbs.).
- Install the LH cam chain tensioner (5) to the cylinder head with two bolts (6). Tighten the T30 bolts (6) to 12 Nm (106 in. lbs.).
- Reset the LH cam chain tensioner (5) by lifting the pawl (3), pushing back the piston and installing tensioner pin (8514) (7). Refer to => [ Resetting Left Cam Chain Tensioner ] Resetting Left Cam Chain Tensioner.
- Install the LH tensioner arm (1).
- Press the LH intake cam phaser onto the intake camshaft. Install and hand tighten the oil control valve.
Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.
- Drape the left side cam chain over the LH intake cam phaser and onto the idler sprocket (1) so that the arrow (3) is aligned with the plated link (2) on the cam chain.
- While maintaining this alignment, route the cam chain around the exhaust and intake cam phasers so that the plated links are aligned with the phaser timing marks (1). Position the left side cam phasers so that the arrows (3) point toward each other and are parallel to the valve cover sealing surface (5). Press the exhaust cam phaser onto the exhaust cam, install and hand tighten the oil control valve (2).
• Minor rotation of a camshaft (a few degrees) may be required to install the camshaft phaser or phaser lock.
- Install the LH camshaft phaser lock (10202) (4) and tighten the oil control valves (2) and (6) to 150 Nm (110 ft. lbs.).
- Remove the LH camshaft phaser lock (10202).
- Remove the tensioner pin (8514) (1) from the LH cam chain tensioner.
- Rotate the crankshaft CW two complete revolutions stopping when the dimple (4) on the crankshaft is aligned the with the block/bearing cap junction (5).
- While maintaining this alignment, verify that the arrows on the left side cam phasers (2) point toward each other and are parallel to the valve cover sealing surface (3) and that the right side cam phaser arrows (7) point away from each other and the scribe lines (9) are parallel to the valve cover sealing surface (8).
- There should be 12 chain pins (2) between the exhaust cam phaser triangle marking (1) and the intake cam phaser circle marking (3).
- If the engine timing is not correct, repeat this procedure.
- Install the engine timing cover, crankshaft vibration damper, upper and lower oil pans and cylinder head covers. Refer to => [ Engine Timing Cover ] Engine Timing Cover.
- Install the spark plugs. Refer to => [ Spark Plug ] Service and Repair.
- Connect the main harness to the engine oil pressure/temperature harness (2) at the rear of the left cylinder head.
- Connect the main harness to the engine injection/ignition harness (1) at the rear of the left cylinder head.
- Connect the Engine Coolant Temperature (ECT) sensor connector.
- Connect the ignition coil capacitor electrical connector.
- Install the A/C compressor (1).
- Remove the generator (2).
- Remove the accessory drive belt (7). Refer to => [ Accessory Drive Belt ] Accessory Drive Belt.
- Install the LH upper intake manifold support brackets (1). Loosely install the stud bolts (2).
- Install the lower and upper intake manifolds (2) and insulator. Refer to => [ Lower Intake Manifold ] Lower Intake Manifold.
- Install the oil level indicator tube (1) and the bolt (2). Tighten bolt (2) to 12 Nm (106 in. lbs.).
- Install the heater core return tube (1) the nut (2), and bolt (3). Tighten nut (2) and bolt (3) 12 Nm (106 in. lbs.).
- Engage two lower wire harness retainers (3) from the intake manifold support brackets.
- Engage two upper wire harness retainers (2) from the intake manifold support brackets.
- Connect the left upstream oxygen sensor connector (1) to the main wire harness.
- Connect the heater core return hose (1).
- Install the resonator. Refer to => [ Air Cleaner Resonator ] Service and Repair.
- Install the air cleaner housing (1). Refer to => [ Air Cleaner Housing ] Air Cleaner Housing.
- Evacuate and charge the refrigerant system.
- Install the engine cover (1).
- If removed, install the oil filter and fill the engine crankcase with the proper oil to the correct level. Refer to => [ Oil Filter ] Service and Repair.
- Fill the coolant system. Refer to => [ Cooling System Draining and Filling ] Cooling System Draining and Filling.
- Raise and support the vehicle.
- Install the belly pan.
- Lower the vehicle.
- Connect the negative battery cable.
- Run the engine until it reaches normal operating temperature. Check cooling system for correct fluid level.
• The Cam/Crank Variation Relearn procedure must be performed using the scan tool anytime there has been a repair/replacement made to a powertrain system, for example: flywheel, valvetrain, camshaft and/or crankshaft sensors or components.