Short cylinders out one at a time to see if you can find out what cylinder it is. Then check oil pressure with a manual gauge. If engine ran without noise it may be something in cylinder which if small enough you may be able to remove a plug start motor and it will get blown out, especially if it seems to be going from one side to the other. Other than that have a local guy look at it. A we can't give a good diagnosis as we can't hear it.
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Wednesday, October 7th, 2015 AT 7:13 AM