Lifter(S), Hydraulic, Roller: Installation

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

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The Multiple Displacement System (MDS) provides cylinder deactivation during steady speed, low acceleration and shallow grade climbing conditions to increase fuel economy.

CAUTION:

Engines equipped with MDS use both standard roller lifters (2) and deactivating roller lifters (1). 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 (3), for the latching pins.

CAUTION:

The lifter and retainer assembly must be installed as a unit.

Courtesy of CHRYSLER GROUP, LLC

Lubricate the tappet guide holder (1) and tappets (2).

Courtesy of CHRYSLER GROUP, LLC

CAUTION:
If the lifters and guide holder assembly are to be reused, they must me installed in their original location.
Install roller lifters and the lifter guide holder (2). Tighten bolt (1) to the proper torque specifications. Refer to 6.4L ENGINE TORQUE SPECIFICATIONS .
Install the cylinder head. Refer to CYLINDER HEAD, INSTALLATION .
Connect the negative battery cable.
CAUTION:
To prevent damage to valve assemblies, do not run the engine above fast idle until all hydraulic lifters have filled with oil and have become quiet.
Start the engine and check for leaks.
Road test the vehicle.