Engine flushing has it's good and bad points, normally there is no problems with doing this, as it will help remove any sludge and carbon deposits, normally engines that are extremely dirty can have a few problems with on going pressure and lifter problems, but this is more to do with age and condition, if the car is in good condition (engine) an occasional flush will not be a problem at all.
Mark (mhpautos)
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Monday, February 22nd, 2010 AT 3:52 PM