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Old 04-07-2010, 06:49 PM
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These are just marks put there at the factory to denote that certain machine operations have been finished or certain assembly steps have been completed, each employee or machine station makes it's mark so that it can be confirmed if there is any confusion later on down the assembly line. You will find these same marks all over the underside of the car when it was new, they just don't show on the motor when new because the factory paints the engine after it has been completely assembled.
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