What's this dimple on the piston?
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Next question - Should I remove the carbon from these pistons? What is a good method to keep the scraped off deposits from going places like down the cylinder wall and onto the top piston ring? Thanks....
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Originally Posted by 01Z28M6
![](http://i11.tinypic.com/2m61v91.jpg)
Next question - Should I remove the carbon from these pistons? What is a good method to keep the scraped off deposits from going places like down the cylinder wall and onto the top piston ring? Thanks....
![](http://i16.tinypic.com/4ife4gi.jpg)
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Any type of pad or material that is softer than the aluminum and will not gouge, nick or mark the piston. Scotchbrite seem to work good. I use a similar pad with a dremel tool. Like was mentioned coat the cylinder walls with oil, i've found fogging oil works best as it's a little tackier than regular oil and catches the carbon better. Use a wet/dry vac sucking helps too. Put the piston your cleaning at TDC to clean. I also tape off the other bores and work on one at a time. After your done take the piston to BDC a few times wiping the bore with new oil and clean rags.