thanks, he will have to have a machine shop check the head for warpage and cracks once he removes it. appreciate your help!Head can be removed without taking engine out. Kubota are quite good engines and this is not a common problem. A problem occurs if the engine has been overheated badly or overheated several times. I've seen 2 times a badly cracked heads. Most of the time passes only by head gasket replasement and grinding the head.