There are precursors to a major accident with a diesel engine

The precursors of burning tile. Diesel engine work speed suddenly reduced, load aggravation, engine black smoke, oil pressure drop, crankcase issued "chirp" dry friction sound, which is the precursor of burning tile. This situation should be immediately stopped, otherwise it will further aggravate the wear of the shaft tile, shaft tile and journal will soon stick together and die, the engine stalled.

The precursor of the sticky cylinder. Sticky cylinders generally occur in the case of serious water shortage in diesel engines. Sticky cylinder before the engine running powerless, water temperature table indicates 100 ℃, to the body of a few drops of cold water, there are "hissing" sound, and white smoke, water droplets quickly evaporated. At this time should let the engine run at low speed or idle speed to reduce the car temperature, if immediately shut down, will lead to piston and cylinder liner sticky cylinder.

Valve into the cylinder of the precursor. Valve into the cylinder, is generally due to the valve rod broken, broken valve spring, valve spring seat cracking, valve lock clip off and other reasons caused by. When the cylinder head part of the "when" the knocking sound, "ch-ch-ch" the collision sound (are pistons touching the valve caused by) or with other abnormal sound, the engine work instability, is often a precursor to the valve fall cylinder. This should immediately stop and turn off the engine, otherwise it will break the piston, cylinder head and cylinder liner, or even top bend the connecting rod, break the body, break the crankshaft.

The precursor of pounding cylinder. Pounding cylinder is a destructive mechanical failure, in addition to the valve fall cylinder caused by pounding cylinder, mostly due to the connecting rod bolt back loose caused by. Connecting rod bolt back or stretching, connecting rod bearing with increased clearance, then in the crankcase parts can be heard "Ta Ta" knocking sound mechanical papers, knocking sound from small to large, and finally connecting rod bolt completely off or broken, connecting rod and bearing cover thrown out, breaking the body and related parts. 

The precursor of a broken shaft. When the diesel engine crankshaft journal shoulders due to fatigue produced by hidden cracks, the signs of failure is not yet obvious, with the expansion of the crack aggravation, the engine crankcase dull knocking sound, speed change knocking sound aggravation, the engine black smoke, soon, the knocking sound gradually increased, the engine produces shaking, crankshaft fracture, followed by stalling. Therefore, when there is an abnormal sound in the engine crankcase, you should immediately stop and check.

The precursor of a broken flywheel. When the flywheel appears hidden cracks, knocking with a hand hammer will make a hoarse sound, the flywheel will produce a knocking sound when the engine is working, the sound will increase when the speed changes, and the engine shakes. If you don't stop and check at this point, it will easily lead to a sudden flywheel shattering, fragments flying out and injuring people and other malicious accidents.

The precursors of "flying". "Flying" before the diesel engine will generally appear blue smoke, burning oil or unstable speed phenomenon. At the beginning, the speed of the diesel engine is not controlled by the throttle, rising rapidly, until it exceeds the rated speed, the engine emits a lot of black smoke or blue smoke. At this time, if you do not quickly take off oil, gas, decompression and other measures to stop, the engine speed will continue to rise, and issued a wild roar, exhaust smoke, speed loss of control, it will cause a major accident such as mashing cylinder.