My experience w/ this is years ago & with cars. For anyone new to the problem:
Generally a head gasket will get leak between an oil galley and a coolant passage. Generally the oild will be under higher pressure & get pushed into the coolant. Oil oughta be less dense, lighter, than the coolant & so float to the top when it doesn't have a chance.
The particulars of this occuring in an ex-500, and any ommissions or corrections to the above... will have to come from the re-build veterans here.
Generally a head gasket will get leak between an oil galley and a coolant passage. Generally the oild will be under higher pressure & get pushed into the coolant. Oil oughta be less dense, lighter, than the coolant & so float to the top when it doesn't have a chance.
The particulars of this occuring in an ex-500, and any ommissions or corrections to the above... will have to come from the re-build veterans here.