A precursor to a major engine failure

A precursor to burning tiles. When the diesel engine works, the rotating speed suddenly decreases, the load increases, the engine emits black smoke, the oil pressure drops, and the crank box emits "chirp" of dry friction, which is a precursor of burning tiles. Encounter this kind of situation should immediately stop, otherwise it will further aggravate the wear of bearing and shaft neck surface scratch stick expansion, bearing and shaft neck will soon bond locking, engine flameout.

Sticky cylinder precursor. Stick cylinder in diesel engine general situation of severe water stress, stick cylinder front engine powerless, more than 100 DEG C indicates the water table, to the body a few drops of cold water, a hissing sound, and white smoke, water evaporates quickly. At this time, the engine should be low speed or idle operation to reduce the temperature of the car, if the flameout immediately, will lead to piston and cylinder liner sticky cylinder.

Precursor of valve falling out. When the valve falls into the cylinder, it is caused by the break of the valve rod, the breaking of the valve spring, the cracking of the valve spring seat and the falling off of the valve lock clamp. When the head part issued "Dangdang" knocking (piston touch valve), "Tsatsa" friction sound (piston valve touch) or with other abnormal sound engine instability, is often a precursor to the valve off the tank, then immediately parking stall, otherwise it will break the piston and cylinder head and cylinder, and even the top bending break body, connecting rod, crankshaft breaking.

A warning to a jar. Tamping cylinder is a destructive mechanical fault, except that the valve is broken and the cylinder is rammed, most of which are caused by the loosening of the connecting rod bolts. The connecting rod bolts loosening or stretching, connecting rod bearing clearance increases, this time in the crankcase parts can hear "blah" percussion sound, percussion sound from small to large, finally connecting rod bolt completely off or broken, connecting rod and bearing cap thrown broken body and related parts.

A precursor to shaft breaking. When the diesel engine crankshaft shoulder ahidden cracks due to fatigue, the fault symptom is not obvious, with the increase in the expansion of the crack in the engine crankcase dull percussion sound, speed change heavier percussion engine black smoke, soon, knocking increases, jitter, produce the engine crankshaft fracture. Then by the fire. Therefore, when an abnormal noise occurs in the engine crankcase, the engine should be checked immediately.

A precursor to a broken flywheel. When the flywheel appeared latent crack, with hammer, a hoarse sound, when the engine works, the flywheel will produce percussion sound, speed change, the noise will be increased, the engine shaking. At this point, if you do not stop checking, it is easy to cause the flywheel suddenly broken, fragments flying out, wounding and other malignant accidents.

The precursor of a "flying car". Speed before the diesel engine will generally appear blue smoke from burning oil, or speed instability phenomenon. At the start of the diesel engine speed control, without throttle rising rapidly, until more than the rated speed, the engine a lot of smoke or smoke. If not promptly take off the oil, gas, and other relief measures to stop, the engine speed will continue to rise, and the issue of mad roar, exhaust smoke, speed out of control, will cause the occurrence of major accidents such as knocking.