Camshaft, Engine: Installation: Camshaft
The 6.4L engine uses a unique camshaft for use with the Multi Displacement System (MDS). When installing a new camshaft, the replacement camshaft must be compatible with MDS.
Use care when installing the camshaft into the engine block, do not damage the camshaft bearings with the camshaft lobes.
- Lubricate the camshaft lobes (1) and the camshaft bearing journals with clean engine oil.
- Install a long bolt (2) into the front of the camshaft to aid in the installation, carefully install the camshaft into the engine block.
- Install the camshaft thrust plate (1) and tighten retaining bolts to the proper specifications. Refer to TORQUE SPECIFICATIONS .
- Using a suitable dial indicator, measure the camshaft end play. Refer to ENGINE SPECIFICATIONS . If not within specification, install a new thrust plate.
- Install the timing chain and camshaft phaser. Refer to CHAIN AND SPROCKETS, TIMING, INSTALLATION .
- Install the A/C condenser. Refer to CONDENSER, A/C, INSTALLATION .
- Install the radiator. Refer to RADIATOR, ENGINE COOLING, INSTALLATION
.CAUTION:
The 6.4L Multi Displacement System (MDS) engine uses both standard roller lifters and deactivating roller lifters. The deactivating roller lifters must be used in cylinders 1, 4, 6, 7. The deactivating lifters can be identified by the two holes in the side of the lifter body, for the latching pins.
CAUTION:Whenever the camshaft is replaced, all lifters must be replaced. If the lifter and retainer assemblies are to be reused, identify the lifters to ensure installation in their original location or engine damage could result.
CAUTION:The lifter and retainer assembly must be installed as a unit.
- Install the lifters (2) and retainer (1) as an assembly into their original location. Refer to LIFTER(S), HYDRAULIC, ROLLER, INSTALLATION .
- Install both cylinder heads. Refer to CYLINDER HEAD INSTALLATION .
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.