Piston ring wear four test steps

In the case of disassembly of the piston ring, with the watch, listen, consumption, filling to check the piston ring wear degree.

Look: Open the crankcase vent when the engine is running. Can see a Unit of Mizu continuous discharge from here as the speed increases, the phenomenon decreases, indicating that the piston has been severely worn.

Listen: While the engine is running, compressed air can also be heard in the vent hole through the piston ring "hissing, hissing", which can be externally verified with a stethoscope. With a long wooden handle screwdriver, one end touches the upper piston movement area in the cylinder opposite the fuel injection pump, and the other end collides with two pieces of the monkey near the ear. At the same time, there is poor compression and the oil consumption increases, which indicates that the piston ring is worn seriously.

Consumption: According to the engine oil consumption and fuel consumption machine oil consumption percentage, the engine oil consumption in a certain period of time before the work is almost the same, after this period increased significantly, the general view that when the oil consumption accounted for fuel consumption For example, Dongfanghong -54 type tractor should replace the piston ring when it is 4% of the volume. When working for 1,500 hours, the oil consumption exceeds 15kg, and the exhaust pipe is blue smoke, the piston ring should be replaced.

Irrigation: When decompression crank engine crankcase ventilation holes, you can hear the piston ring "cries, cries" leak sound, in order to verify the above phenomenon is true, you can add Qiqi into the appropriate amount of oil, and then shake off Turn the crankshaft, leakage disappeared, or significantly reduced, indicating the gap between the piston opening and side wear serious wear and tear, you must replace the new pieces.