I feel like the school kid who hasn't ben paying attention in class.... This topic has been on here numerous times and I wasn't paying attention! 
I changed the oil in the 770 diesel today and found a lot of antifreeze in the oil  <!-- s:( --><img src="{SMILIES_PATH}/icon_sad.gif" alt=":(" title="Sad" /><!-- s:( -->  It could be a bad head gasket, but does that engine have Sleeves?  Any easy way of figuring out which it might be? If it is sleeved and one is leaking, how would I know which one? This tractor has been evil since I got it... I'd part it out but no sense in putting evil parts in other tractors.... evil would spread like the plague!!
 I am undecided what to do with this machine at this point. It has too many other woes, but the engine does run smooth. Incidentally, there is no white smoke from burning antifreeze. ( I have not yet checked for oil in the radiator)
  Thanks for any help you folks can provide.
                      Cal