At Maine Mini Cooper specialist garage, Atlantic Motorcar Center (AMC), the service team has reported seeing a significant number of MINIs with extensive and problematic carbon build-up on the intake valves.
They attribute this issue to MINIs use of a direct injection fueling for its engine in the current MINI Cooper line. To be specific, thee engines direct a spray of atomized fuel directly into h cylinder, as opposed to earlier engines that inject the fuel into the intake passage to blend with the incoming air before it arrives in the engine cylinder.
The direct injection arrangement is designed to improve fuel efficiency, however, they are, according to the Atlantic’s mechanics, more likely to suffer from carbon build up. The AMC chaps have put together a helpful Q and A article to explain the problem in more detail, how to diagnose it, how to prevent it, and how to repair it if it does happen.
The original article can be found here.
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