Combustion Chamber Cleaners
- January 26th, 2010
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A word of caution on using combustion chamber cleaners…
On some engines that have an EGR Valve (older 3.9, 5.2, or 5.9 or newer 3.7 and 4.7 engines) you may want to think twice about using a combustion chamber cleaner like SeaFoam or Mopar’s Combustion Chamber Cleaner. If you don’t know what these products do, they do a GOOD job of cleaning out the combustion chamber, forcing the carbon deposits out to the exhaust system. But if your engine has an EGR valve, the carbon being exported may clog up your EGR (exhaust gas recirculation) valve. This will probably cause a check engine light and taking out the valve and either cleaning it or replacing it.
Unfortunately, I confirmed this on my 05, but luckally NAPA had them in stock!

