I have a 524td that has a cracked head. The mechanic says that the thing can be welded and pressure tested. Is this reliable? Then he wants to do a complete rebuild with new parts and will give me a 24K/2yr warranty. I don't know whether this is the best thing to do. It certainly isn't cheap. But new cars are expensive. I'm looking for another engine or head alone but I suppose one can never be sure when buying used parts. Should I repair what I have or throw in the towel? I'm really afraid to sink alot of money into a rebuild + new radiator and starter then have more things go wrong with it. The body's very good and the trans is smooth, A/C works power stuff mostly works. It'll probably be $5000 by the time everything's done. Roger