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Subject I am not an expert but that sounds a lot like when I had a
     
Posted by Hoppy2 on February 21, 2013 at 6:58 AM
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In Reply To Re: spun bearing or cam bearing posted by ZEchen951 on February 20, 2013 at 06:36 PM
     
Message bad big end rod bearing. I was lucky and it didnt spin. was just out of tolerance. Mine happened on a dyno run.. fix it ASAP to avoid further damage. depending how skilled you are its an easy job.
I have heard of people doing it with engine in the car, I explored this option when I did mine and quickly gave up. MUCH easier to pull the engine and do it on a stand.
When I did mine all I did was slap new bearings in, I miced everything then plastigauged each one before final assembly to be sure they were all in spec. Search for how to determine proper bearing size. I am 4000miles post repair with no issues.
Good luck with the repair.

     
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