Thanks for the replies guys, engine is in the car now and after fiddling round with the injectors it's running on 4 cylinders. I'll see what I can do to get it off, me and my mate had a very similar problem on his astra, took is best part of a day to get it off. Does anybody have any idea what changing the belt is like in an Si/16V XR2i etc. Looks very tight, engine was a pig to get in and out?