Yanmar 2GM Engine Rebuild: Injectors removal and testing (Part 1)
February 16, 2021 · 10 min · 56K views
What this video covers
Cory troubleshoots a Yanmar 2GM diesel engine by removing and testing the fuel injectors to diagnose a suspected lack of fuel delivery.2:14 After noticing sludge in the primary fuel filter, he removes the injectors by loosening the retaining caps and fuel lines, using a 17mm wrench to hold the back nuts steady.2:27 He tests the spray pattern by reconnecting the injectors to the fuel lines and turning the engine over by hand, holding a piece of cardboard to observe the atomization.5:29 One injector pops out using engine compression, while the other requires a pry bar.6:54 He cleans carbon buildup from the tips using a soft brush and carb cleaner.6:34 While the injectors eventually produce a consistent cone-shaped spray, he concludes that deeper issues with engine compression necessitate removing the cylinder head.7:31 He plans to dismantle the alternator, exhaust elbow, thermostat cover, and rocker arms to access the head, noting that the lack of local spare parts may force a return to the United States.8:59
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