This very tidy Mini Cooper S with the N14 engine in with us for an intake valve & port walnut blast cleaning procedure. This is to remove the carbon build up around the intake valves that occurs over time. We recommend around every 60,000 miles for a clean. This build up occurs on direct fuel injection engines where the fuel is no longer injected inside the intake manifold which used to wash the valves to prevent this build up from occurring.
A mixture of crank case oil, egr gas on some engines then extreme heat on the valves causes this build up. The driver will notice a drop in performance and rough running, sometimes a misfire when started from cold if the build up is extreme enough to restrict the air flow into the combustion cylinder.
This procedure is the most cost affective way to remove the carbon build up. Eliminating the need to remove the cylinder head to manually clean the valves! This procedure can be carried on various BMW & MINI, Petrol & Diesel engines with direct fuel injection.
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