2000 JGC cracked cyl. head

I have a 2000 Jeep GC, it was loosing eng. coolant. Took it back to the dealership twice, they said nothing is wrong that the inline 6 is a good engine. Well I finally paid someone to take it apart and had the cyl. tested and it was cracked. I mailed Daimler Chrysler all my receipts and they paid me back all except about $200. I was pleased with this, but now 14K miles later it leaks again. The casting # is 0331. When I get the JGC paid off I'm going to put either a v6 or v8 in it.