Please could any members suggest a reputable company to repair or replace my engine. My problems started a fortnight ago, travelling on the M1 the car made a noise similar to dragging a stick along some railings and was followed by a lot of black smoke from the exhaust. Pulling over onto the hard shoulder, turning the ignition off and the engine continuing to run on and build up its own revs led me to having to stall it to stop it. On checking the oil level, it was alarmingly high, 4 inch above maximum fill and it smelt of diesel. I called a breakdown recovery service and was recovered. The technician believed the problem to be the injector seals as fuel was in the oil however, having replaced these its now looking as though I have a cracked cylinder head or possibly a cylinder as I am still getting diesel into the oil - to top it off the engine sounds different and am told this could be a damaged piston. Am thinking my best option is a refurbished engine, can anybody suggest a good company near to West Yorkshire? Thanks for any responses.