Durango 2WD V8-5.7L Hybrid (2009)
Lifter / Lash Adjuster: Description and Operation
Hydraulic Lifters - Description
DESCRIPTION
The Multiple Displacement System (MDS) provides cylinder deactivation during steady speed, low acceleration and shallow grade climbing conditions
to increase fuel economy.
The MDS can provide a 5 to 20 percent fuel economy benefit when operating in four-cylinder mode. Depending on driving habits and vehicle usage.
Fuel economy is 8 to 15 percent higher than if the engine was operating on eight-cylinders at all times.
MDS is integrated into the basic engine architecture, requiring a minimum of additional parts - four additional solenoids, an oil temperature sensor, a
wire harness, eight unique valve lifters (1), and a modified camshaft.
The MDS lifter (1) can be identified by the disconnecting pin (3) on the side of the lifter.
