I have to do a head gasket repair on my 2001 4 cyl accord ex. I Notice carbon deposits on the top of the pistons while doing a piston soak in the hopes of slowing my oil consumption. Is there any way I can clean the carbon off the piston top and more importantly piston rings while I have the head off?
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Carb cleaner? Seafoam? Gas + rag?

 

For the lazy man,such as myself, pour sea foam on top of the cylinders and let it sit, watch the carbon turn into goo.
For the more adventurous, gently scrape the carbon off the top off the piston using a utility knife blade, not a razor blade.

 

What also works really well, is use good quality gas (shell Chevron 76 texaco) and drive it hard. Higher rpm's and internal heat breaks up the carbon deposits and keeps new deposits away.

My cd5 didn't have any carbon deposits on the head or pistons when i changed the head at 230,xxx miles.


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