8th Apr 2015, 09:44

Blown head gasket, between the water jacket and combustion chamber. It's getting burnt and blown out the exhaust. If you can perform a compression test, you will find which pot it is, and will confirm it's this issue before removing the head.

4th May 2015, 02:21

You have probably found the leak by now. If not, check out the water pump.

Good luck.