RAM 2500 Truck 4WD L6-5.9L DSL Turbo VIN 6 (1999)
Camshaft: Description and Operation
The camshaft is constructed of ductile iron and is shot-peened in the #1 journal and valve lobe area for superior strength and durability. The camshaft
is supported by a bushing at the #1 journal location, and is lubricated by a film of oil supplied by the crankshaft main journals. The camshaft is driven
by a pressed on gear and its lateral movement is controlled by a thrust plate. The engine also uses solid. "mushroom" style tappets to open and close
the valves.
PUSH RODS, ROCKER ARMS, AND CROSSHEADS
Overhead System Components
The 24-valve overhead system incorporates rocker arms that are designed to allow fuel injector service without removing the rocker arms and
pedestals. The unique intake and exhaust rocker arms have their own rocker shafts and are lubricated by passages intersecting the cylinder block main
oil rifle. Crossheads are used, which allow each rocker arm to operate two valves.
The solid push rods are hardened at the rocker arm and tappet contact areas for superior strength and durability.
