Carbon buildup at top of piston may cause noise on Dodge Ram 1500

Problem Description and Possible Solution

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.

Problem Data
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Average mileage: 169,029 (100,089–295,000)
Engines affected: 4.7L V8, 5.2L V8, 5.9L V8
9 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2001, 2002
13 people reported this problem
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ticking and hammering noises
Spark knock