Re: MCI engine noise
I am not trying to insult you in any way. I do not know you, or your abilities, so I have to start basic. Please bear with me. I can help.
It would really help if you would post a video of the engine and sound. You may have to use Youtube.
What makes you think it is a ball bearing?
Are you re-using bearings? How did you inspect them? How did you clean them?
Other possibilities:
Piston slap
rod bearing slap
balancer not timed correctly (did the engine seize up ever?)
The list goes on, but above are common problems we get.
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