Not too hard. Some things I learned: an engine support makes life easier. I had a jack under the engine and had to move it up, down, under the car, over the car, it was a great work out! Have a mirror to double check the tensioner and injection pump positions. The tdiclub and myturbodiesel writeups were very helpful, there were enough pics and descriptions so that anyone can do it. As long as you read the instructions beforehand and follow them, you'll be OK.