Last year at 70,000 careful miles several swirl-flaps came adrift on my BMW 730d and one went through the engine into the turbo. Inlet manifold and turbo replaced, one set of valves and piston changed ...
My BMW 320d, 04 plate, broke down a few weeks ago with a clattering sound. It was towed to the garage. They said that one of the swirl flaps had fallen into the engine. The garage is looking for a ...