Here's a breakdown of why it's complex and what's involved:
* Requires Specialized Tools: You'll need tools like a torque wrench (capable of precise torque settings), fuel plate removal tool (often a specialized socket and possibly a puller), and possibly a fuel system pressure gauge. Improvised tools can easily damage the fuel plate or the injection pump.
* Fuel System Pressure: The fuel system needs to be properly depressurized before attempting removal to avoid fuel spraying and potential injury.
* Precise Alignment and Adjustment: The fuel plate's position within the injection pump dictates the engine's fuel delivery and timing. Incorrect reassembly can result in poor performance, excessive smoke, rough running, or even catastrophic engine failure. Getting the alignment wrong can be costly to correct.
* Potential for Damage: The fuel plate itself is delicate. Improper handling or tool use can easily bend or damage it.
* Safety Concerns: Diesel fuel is flammable, and working on a pressurized fuel system presents a risk of injury.
In short: Unless you have significant experience working on diesel engines, particularly 12-valve Cummins engines, it's strongly recommended to have a qualified mechanic perform this task. The potential costs associated with damage from improper removal and reinstallation far outweigh the cost of professional labor.
