I have A Kubota RTV1100 that has blown the head gasket twice. First time it was a cracked head, this time I am wondering if I should just replace the motor with a rebuilt one. Any suggestions are greatly appreciated. I don't have the extra 10 to 15K it would take to replace the machine with a newer one. Only 1300 hours on this machine. It looks great and everything works great. It just takes some antifreeze every day.