One the 3.9L V6 and 5.9L V8 the carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms may vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.
Carbon buildup at top of piston may cause noiseon Dodge Ram 3500
Average mileage : (–)
Engine Affected: 5.9L V8
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