As some of you may know R56 MINI Cooper S turbo models especially the N14 engined models suffer from carbon build-up on the valve backs , there have been various ways to deal with this some involving cylinder head removal some chemical , BMW developed a solution using crushed walnut shells being blasted into the ports following inlet manifold removal and the residue vacuumed out . walnut shells are a blasting media that do no damage even if a little is left behind . good news is We now have the capability to carry out this procedure after many months of trying to get our hands on the tools ---- long story !! . give Me a call or PM for pricing or appointment .
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