In Yunnei 4 100 engine, the oil 1 and the exhaust pipe of cylinder 4 are leaking very seriously, and the phenomenon of burning oil is also very serious. Four sets have just been changed, and the intak

In Yunnei 4 100 engine, the oil 1 and the exhaust pipe of cylinder 4 are leaking very seriously, and the phenomenon of burning oil is also very serious. Four sets have just been changed, and the intake and exhaust valves are all newly changed. ... 1, four matching sleeves, piston diameter measurement error, cylinder liner measurement error, or negligence in matching, screwed up the matching object, resulting in excessive cylinder clearance. Re-measure the cylinder clearance. 2. There is wear around the oil passage on the bottom surface of the cylinder head, and the cylinder gasket is not tightly pressed. 3, piston ring size or installation error, leading to pump oil into the cylinder. 4. The connecting rod bearing bush is too loose, resulting in too much oil leakage, and the piston ring can't scrape the oil on the cylinder wall. It is often the most easily overlooked. 5, air compressor wear, a lot of gas into the crankcase. 6. Crankcase respirator failure, resulting in too high crankcase pressure. 7, the oil label is wrong, too thin, too much oil.