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Jeep Grand Cherokee Carbon buildup at top of piston may cause noise

 
Jeep Grand Cherokee Problem
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Model Years Affected: 1993, 1994, 1995, 1996, 1997, 1998

Engine Affected: 5.2L V8

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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.

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