Hi all, I have a 2011 Cooper D with the N47 BMW engine and 85k miles. It is the 3rd. time I've had holes blown out of the intake manifold. 1st. time at around 65-70k miles on clock only the manifold was changed then BMW told me it was caused by the ERG valve sticking open so that was changed along with a 2nd. manifold. Yesterday I thought the car had caught fire there was so much smoke and burnt plastic smell. After a few minutes the smoke died away so I took a look a bit closer and found about 6 in. of the intake manifold had burnt/melted away. So it's back to BMW once again. It seems to run aprox 10k mile between burnouts.Anyone have any idea?