The following events occur during the compression stroke for any of the cylinders of the 6.5L V8 turbo diesel engine (refer to Figure 1-6):
• At the end of the intake stroke, the rotating crankshaft also rotates the camshaft, and the intake lobe for the cylinder allows downward movement of a hydraulic roller lifter.
• Intake valve spring pressure pushes the intake valve closed and also operates the rocker arm, moving the push rod and lifter downward.
• As the crankshaft rotates, it pushes the connecting rod/piston for the cylinder in an upward direction.
• The action of the piston causes the air (and crankcase gases) in the combustion area of the cylinder to be greatly compressed and heated.
