Engine Knocking Noise From Carbon Buildup on Chrysler Town & Country

Carbon buildup on the top of the piston is common. Over time this can lead to symptoms varying from light ticking to knocking noises. Performing a fuel injector cleaning procedure can often help the condition by removing some of the piston top deposits.

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Average mileage: 142,274 (128,000–167,000)
4 model years affected: 1990, 2001, 2002, 2005
5 people reported this problem
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problem details
2005 Chrysler Town & Country 167,000 mi,
The van ran hot and started making a knocking noise. The running hot issue was a thermostat sticking. We just replaced the thermostat. I do not know why it is knocking. We have tryed changing the oil, the oil filter, and an air screen. It hasn't helped
2001 Chrysler Town & Country 135,098 mi,
Knocking noise
2002 Chrysler Town & Country 139,000 mi,
Loud knocking from tio end of engine when under load.