i opened up the head assly and removed the block from the engine.. the bore does seem clean but yes it has deep scratches... I even got the head and bore cleaned with high pressure steam so that it was clean from any carbon deposits... but it did not help... According to my mechanic, maybe this cleaning could have made the matter worse by removing the carbon deposits.. he says that carbon deposits are not always harmfull. sometimes, removing them causes more problems... as they say, if it aint broke, dont fix it

it could also be more due the fact that this bore was already overdue for replacement.



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