Carbon buildup at top of piston may cause noise on Dodge Caravan

Carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.
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Average mileage: (–)
5 model years affected: 1991, 1992, 1993, 1994, more1995
5 people reported this problem
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