The premonition when diesel engine produce serious fault

The premonition when diesel engine produce serious fault
Burnt precursor. When the diesel engine is working,the speed reduce, load increase in a sudden, black smoke engine, oil pressure drops, the crankcase issued a “chirp” sound of dry friction, which is a precursor to Burnt. In such cases should be immediately shut down, otherwise it will further increase the bearing wear, the journal surface sticky grasp the rapid expansion of bearing and journal will soon be bonded locking, engine flameout.
Stick cylinder precursor. Stick-cylinder diesel engine is generally the case of severe water shortage occurred, unable to stick cylinder before the engine is running, water temperature gauge indicates than 100 °C, a few drops of cold water to the body, the “hissing” sound, and white smoke, water droplets are fast evaporation. At this time should be allowed to idle the engine at low speed or to reduce the vehicle temperature, if the flame immediately, will result in sticky piston and cylinder liner cylinder occurred.
Off the cylinder valve precursor. Valve into the cylinder, generally due to the valve rod broken, broken valve spring, valve spring seat crack, lock folder off the gas and other causes. When the head position to issue “Dangdang” percussion (hitting the piston valve), “Cha Cha” friction sound (touch the valve piston), or accompanied by other abnormal sound, engine instability, is often a precursor to valve off the tank, Then stop immediately turn off, it will be broken piston, cylinder head and cylinder liner, connecting rod or the top bend, break the body, broken crankshaft.
Pound cylinder of the precursor. Pound cylinder is more destructive of mechanical failure, in addition to causing pound cylinder valve off the tank, most is due to retire due to loose bolts connecting rod. Back or loose connecting rod bolt stretch, the connecting rod bearings with the gap increases, then the crankcase parts can be heard “blah,” the percussion, percussion sound from small to big, and finally completely off the connecting rod bolt or broken connecting rod and bearing cap thrown, breaking the body and related parts.
Off the axis of the precursor. When the diesel engine crankshaft shoulder at the hidden due to fatigue cracks, the fault symptoms is not yet clear, with the expansion of cracks increased, the engine crankcase to issue a dull percussion sound, percussion increase speed changes, the engine take smoke, and soon, percussion gradually increased, the jitter generated by the engine, crankshaft fracture, then en-fire. Therefore, when the enginecrankcase unusual sound, should immediately stop checking.
Flywheel fragmentation of the precursor. Hidden cracks appear when the flywheel, hand percussion hammer, will issue a hoarse sound, engine work, the flywheel will have a percussion sound, speed changes, the sound will increase the engine earthquake shaking. At this point if not down to check, can easily lead to a sudden broken flywheel, flying debris injuries and other accidents.
“Speed” of the precursor. “Speed” before the emergence of diesel engine usually take the blue smoke, burn oil or speed instability phenomenon. From the start of the engine speed throttle control, a rapid increase until it exceeds the rated speed, the engine emitted a lot of smoke or blue smoke. At this point if not quickly take off the oil, breathe, and other measures to stop the vacuum, engine speed will continue to rise, and issued howling sound of the exhaust pipe smoke filled the air, speed out of control, pound cylinder will cause major accidents