Removing carbon from pistons in place
- Thread starter chrispix
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rvich
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Rotate the crank so that the pistons are at near bottom, dump some ATF in there and let it sit for a couple of days. If it all drains into the crank then you have other issues to think about. But it will loosen the carbon and make it much easier to scrape off with your wife's bamboo kitchen utensil.
Russ
Russ
There is a way that involves a lot of elbow grease, obtain some kiddy’s Plasticine and roll into lengths and fit around the top of piston/barrel, then tape up the pushrod tubes fill other cyl with rags, e.t.c.and scrape away carbon with the back of a discarded tablespoon.
Since you are this far anyway, now may be a good time to re-ring and validate any cylinder/piston wear. Get a good look at the cam and other things while you are in there too. You could also lap the head to cylinder.
Otherwise, as some one else said, seal all the oil, thread, and pushrod holes and scrape it off. No big deal.
Otherwise, as some one else said, seal all the oil, thread, and pushrod holes and scrape it off. No big deal.
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The old trick was to coat the top 1 inch of the cylinder bore with a thick grease like wheel bearing grease. Raise the piston to the top, Then paint a litte Easy Off oven cleaner on to the carbon on the piston top. Let it sit over night, & most of it will wipe off. then scrape or wire brush any carbon left. When done, turn the engine so the piston goes down in the bore & leaves the grease ring full of carbon particles at the top where it can easly be wiped out with a rag.
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