Seller notes

MINI cooper N14 and N18 engines are notorious for building up thick carbon deposits on top of the intake valves. This will starve the engine of air and can cause significant damage from burnt valves. Carbon cleaning is a frequent service performed by MINI dealers, but they will typically charge $750 or more. If your MINI is over 40K miles, chances are you need it done. The best way to do this is through blasting the carbon with walnut shells. This is also what a MINI dealer will do. However, bla...

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