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Old 03-11-2013, 07:59 AM
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Crankshaft ??

lOOKING FOR EXPLANATION OF CRANK PIN WEAR. WHY DOES THE SIDE OPPOSITE THE PISTON SEEM TO WEAR MORE THAN THE SIDE CLOSEST TO THE PISTON??

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Old 03-11-2013, 11:37 PM
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Do you have any pictures?
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Old 03-12-2013, 05:42 AM
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Most crankshafts feed oil on the side closest to the piston. Excessive bearing clearance, low oil pressure, heat will bleed off the oil film towards the opposite side. Also the rod assembly is being pushed down from combustion in cylinder and changing directional forces as it goes thru bottom dead center. This plus the lack of oil or contaminated oil causes the wear which keeps getting worse.
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Old 03-12-2013, 07:16 AM
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Suspected oil film issue but was looking for additional info! Was unsure if it was partialy caused by centrifugal force along with thin oil film or what. It this condition normal? Besides oil issues are there other remedies for the condition?
Thank you for your input!!
I have no pictures at this time.
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Old 03-12-2013, 07:37 AM
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An old school method was to cross drill the rod journal to get a more even oil flow to the bearings. insuring sufficient oil flow with expanded capacity pans..wider rod journals will help which requires a custom crank and rods. Bear in mind that the way the factory builds them can get miles of smiles from the average motorist..Just us that try an get the maximum power that have difficulties...

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