Calm down here. It is a sleeve type engine. First 2 things to check: Remove the valve cover and see if any of the soft plugs under the valve cover leak. Next step Remove the oil pan. If you can find someone with a radiator pressure tester so much the better. Fill the cooling system. Pump it up to 5 PSI and see if you can find antifreeze leaking around the bottom of any of the sleeves. Also recheck soft plugs under valve cover at this time. A 770 is about as simple as it gets. What is evil about the tractor?