My Jinma 354, 360 hours, is leaking oil out of the respirator. I changed the oil and filter, but under load, it pumps the oil out. I did not see any loose nuts or gaskets leaking, just a lot of oil on top of the starter motor, with plenty of smoking and dripping.
Could it be a simple problem, or am I having blowby big time? I have the 4 cylinder version.
look at your coolant see if it has oil at the top ,maybe look with the cap off and see if there is to much turbulance in the radiator with the engine running.if you can do a compression test,it is a pain but maybe just a head gasket,better than the other things it might be.was the head retorqued after 50 hrs? was there a lot of metal in the oil when you changed it?