I have a Freelander TD4.

I was towing my 1500 Kg caravan up a long hill.
There was a bang from inside the engine or new catalytic convertor.
I lost power and great swathes of black smoke emerged from my exhaust.

The engine still runs OK and does not overheat. There is no water in the engine oil. Just lots of black smoke. I do not seem to be burning oil.

Any ideas?
TPW.

http://www.landyzone.co.uk/lz/f20/terry-watson-retired-268862.html

answered in your other thread - have you checked your turbo hoses ?