Thread: Whats everyones opinion that knows motors that cause these rings on daihatsu to go?

I have heard of people removing the carbon deposits from the top of the pistons when the head is off and the crud going down between the piston and bore and causing problems. I seem to remember most sources saying just leave it but an old mechanic friend said he would put the piston near tdc and put grease in the gap, clean the crowns and move the pistons to bdc and wipe out the grease which had caught all the carbon.