Connecting Rod Bearing Noises

Connecting Rod Bearing Noises Points : connecting rod bearing noises , engine noise analysis, problems in internal combustion engines, ic, engine, auto diesel Connecting rod-bearing noises are usually a light rap or clatter of much less intensity than main bearing knocks. The noise is most audible when the engine is “floating”, or running with a light load at approximately 25 to 35 mph. The noise becomes louder as the engine speed is increased.

Connecting rod bearing knocks can be located best by grounding out each of the spark plugs, one at a ‘time. (These noises should not be confused with piston or piston pin knocks) Short circuiting one spark plug at a time is the best way to locate a bad bearing. Generally the noise cannot he eliminated entirely by a short circuit, but ordinarily will be reduced considerably.