Intake and Exhaust Camshaft, Bearing Cap, and Lash Adjuster Installation
Intake and Exhaust Camshaft, Bearing Cap, and Lash Adjuster Installation
Exhaust Camshaft Installation
1. Install the camshaft bearing lower front cap (1).
Note: Pre-fill the low pressure chamber with engine oil. Maintain a vertical orientation of the assembly to retain the oil in the reservoir and high pressure chamber. Do not install the lash adjusters without pre-filling the low pressure chamber. Apply engine oil to the outer diameter surface of all adjusters.
2. Lubricate and install the hydraulic valve lash adjusters (1) into their bores in the cylinder head. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
3. Lubricate the valve tips. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
Note: Used rocker arms must be returned to the original position on the camshaft. If the camshaft is being replaced, the rocker arms actuated by the camshaft must also be replaced.
Note: Pre-oil roller bearings before installation.
4. Lubricate the roller bearings with valve rocker arm lubricant. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
5. Position the valve rocker arm (1) on the tip of the valve stem and on the lash adjuster and lubricate. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
Note: Apply lubricant to all lobes and journals prior to installing the camshafts.
6. Lubricate the exhaust camshaft lobes and journals with camshaft lubricant. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
7. Set the exhaust camshaft (1) on top of the rocker arms in the camshaft bearing journals with the actuator timing mark at approximately the 1 O'clock position.
Note:
* Do not apply final torque at this time. Camshaft cap final torque is applied in sequence when all caps are installed on both intake and exhaust camshafts.
* To properly position the camshaft caps, install the camshaft cap bolts into the camshaft caps prior to installing the camshaft caps on the camshafts.
8. Install the camshaft cap bolts (3) into the camshaft caps (2).
9. Install the camshaft caps (2) and hand start the camshaft cap bolts (3).
Intake Camshaft Installation
Note: Pre-fill the low pressure chamber with engine oil. Maintain a vertical orientation of the assembly to retain the oil in the reservoir and high pressure chamber. Do not install the lash adjusters without pre-filling the low pressure chamber. Apply engine oil to the outer diameter surface of all adjusters.
1. Lubricate and install the hydraulic valve lash adjusters (1) into their bores in the cylinder head. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
2. Lubricate the valve tips. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
Note: Used rocker arms must be returned to the original position on the camshaft. If the camshaft is being replaced, the rocker arms actuated by the camshaft must also be replaced.
Note: Pre-oil roller bearings before installation.
3. Lubricate the roller bearings with valve rocker arm lubricant. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
4. Position the valve rocker arm (1) on the tip of the valve stem and on the lash adjuster and lubricate. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
Note: Apply lubricant to all lobes and journals prior to installing the camshafts.
5. Lubricate the intake camshaft lobes and journals with camshaft lubricant. Refer to Adhesives, Fluids, Lubricants, and Sealers (LCV) [1][2]Fluid Type SpecificationsAdhesives, Fluids, Lubricants, and Sealers (LTG) [1][2]Fluid Type Specifications.
Set the intake camshaft (3) on top of the roller followers in the camshaft bearing journals with the intake actuator timing mark at approximately the 11 O'clock position.
Note: To properly position the camshaft caps, install the camshaft cap bolts into the camshaft caps prior to installing the camshaft caps on the camshafts.
6. Install the camshaft cap bolts (1) into the camshaft caps (2, 4).
7. Install the camshaft caps (2) and hand start the camshaft cap bolts (1).
8. Install the camshaft rear cap (4) and hand start the camshaft cap bolts (1).
Caution: Refer to Fastener Caution Fastener Caution.
Note: During the tightening sequence, locate and tighten each camshaft cap bolt installed into the circular hole first. Then, tighten the bolt installed into the slotted hole.
9. Tighten the camshaft cap bolts in sequence using the following procedure:
1. Tighten the camshaft cap bolts in sequence to 8 Nm (71 lb in).
2. Loosen both bolts in each cap in sequence to 180 degrees.
3. Tighten the camshaft cap bolts in sequence to 10 Nm (89 lb in) twice.
Note: Installation of the timing chain guide (2) and bolts (3, 4), and final torque for the front bearing cap is performed after the timing chain is installed.
10. Install the front camshaft bearing cap (1). Install the 2 outer bolts (5) for the front camshaft bearing cap finger tight.