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Bead blast pistons?

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Mike

05-06-2002 16:13:49




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I'm doing a complete teardown and rebuild on a 1941 B. Should I bead blast the pistons? They have 60+ years of carbon and grime. If so, would the new rings I install seat properly in the grooves?

Mike




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G Taylor

05-06-2002 22:28:14




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 Re: bead blast pistons? in reply to Mike , 05-06-2002 16:13:49  
It will be less bother and cost no more in the long run to just purchase a set of new aluminium gas pistons & have more power too. Or there is FIT's cleaning system(s) to clean the old iron pistons.



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Donny-B

05-06-2002 18:52:53




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 Re: bead blast pistons? in reply to Mike , 05-06-2002 16:13:49  
Mike, I have bead blasted several sets of CAST IRON pistons, top and ring grooves, with no adverse affects. It is almost impossible to soak off 50+ years of burnt in carbon that accumulates under the rings. I have tried several methods including setting them up in a lathe and cutting the carbon out, but glass beading leaves them clean and does not remove the base metal. You should however wash the pistons in clean solvent afterwards for several minutes using a stiff fiber brush to remove any glass particals.

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Clooney

05-06-2002 17:46:55




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 Re: bead blast pistons? in reply to Mike , 05-06-2002 16:13:49  
Mike, I bead blast pistons {tops only} all the time but don't recommend it if you don't have a good means to mask the sides & ring grooves. ~Under no condition should the sides or ring grooves be blasted & the use of glass beads only {no sand}. ~G-MANS suggestion to hot tank them would be much safer if you don't have the means to mask & get them completely bead free afterwards.....



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G-MAN

05-06-2002 17:11:23




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 Re: bead blast pistons? in reply to Mike , 05-06-2002 16:13:49  
Mike. I've bead-blasted a lot of parts, but I've usually tried to stay away from engine parts. It seems nearly impossible to get all the media back out. I had good luck soaking a lot of the smaller parts of my G trans in one of those buckets of carb cleaner you can buy at auto parts stores. It cut right through what seemed to be 50 year old trans grease pretty well. I would try the same with your pistons. If they are cast pistons, you could also have a local machine shop, etc hot tank them - that would work pretty well also. Just my two cents.

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