A single, spring loaded, delivery valve (Figure 4-78) is located in the center of the DB2 pump rotor. It serves as a one way check…

A rotor seizure can be due to a loss of clearance between the hydraulic head and rotor during the transient (or warm-up) condition. Heat generated…

The final component that we will examine is the heart of the diesel injection pump; the rotor. (Figure 4-77). Due to the extremely close tolerances…

See Figure 4-76. The 6.2L uses a ball-pivot governor arm which has a slot below the bi-metal strip. This prevents interference with the ball pivot…

When idle speed drops due to hot fuel, a bi-metal strip on the governor arm deflects. This creates a “ spring load” on the governor…

The 1984 and later 6.2L California applications use an internal idle spring, which controls the gap between the sleeve and the washer. (Figure 4-74). The…

Now for a look at the operation of the assembly that controls the engine speed at low idle and high speed. The Min-Max governor. Illustrated…

All pumps are equipped with a Housing Pressure Cold Advance solenoid. (Figure 4-67). This component has been designed to allow more advance during engine warm-up.…

A new head locating screw (#24566) with nylon filter has been introduced to prevent contaminants from reaching the advance piston area. See Figure 4-66. The…

See Figure 4-65. The advance piston orifice screw has been eliminated, and the orifice is now machined into the piston. The orifice size in 1984…