Phenomenon:
   
1) the engine idling sound, and issued a "gurgling" sound (issued by the crankcase high speed)
   
2) acute fuel and release the throttle instantly sound more obvious.
   
3) temperature, no significant change. When the load increases, the sound increases.
   
4) sound than the crankshaft FAG import bearing sound slow, short.
   
Reasons:
   
1) connecting rod FAG bearing and journal wear excessive radial clearance is too large.
   
2) connecting rod bearing cap fastening bolts loose.
   
3) link FAG bearing alloy ablation or fall off.
   
4) lost a round rod journal.
   
5) connecting rod FAG bearings and bearing relative rotation.



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