Exclusion of imports of automotive crankshaft bearing abnormal sound

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 Crankshaft imports bearing abnormal sound is the main cause for the gap.
 Phenomenon:

 1) the stability of the engine is running under normal circumstances there is n o sound issued when sudden changes in speed of the engine is running, boring boring boring percussion, accompanied by the vibration phenomenon.ball bearing companies

 2) the engine load changes, the sound significantly. The higher speed, the greater the sound.

 3) single-cylinder off the fire, do not feel change will be significantly reduced, while the sound of two adjacent cylinders at the same time off the fire.roller thrust bearings

 Reasons:

 1) crankshaft journal with the gap is too large.

 2) the crankshaft axial clearance is too large.

 3) The crankshaft bearing cap bolts loose.

 4) crankshaft bearing journal lubrication bad causing the bearing alloy ablation shedding hair ring.buy bearing

 5) crankshaft bending loss round crankshaft journal.

 6) crankshaft bearings and bearing relative rotation.

 Diagnosis:

 1) The sound from the bottom of the cylinder lower part close to the crankcase at. The oil pressure is decreased significantly. Engine in the low state of the medium-speed jitter throttle, send a clear and dull continuous percussion accompanied by the phenomenon of engine vibration.

 2) high speed engine, airframe vibration, oil pressure decreased significantly compared with the bearing and journal gap is too large or bearing alloy ablation off.

 3) single-cylinder off the fire test the sound of little change, while two adjacent cylinders off the fire when the sound is significantly decreased or disappeared, compared with the hair between the two cylinder crankshaft bearing ring.

 4) the speed is not high bod y vibration is large, swing shaking phenomenon, also issued a heavy, large "boom boom" percussion, compared with the crankshaft fracture.

 5) with increasing temperature, the sound of the increase to high speed when the sound becomes messy, possibly crankshaft bending.