what to use to clean pistons in block.

[Gvr-4]

I bough a used block from a guy and the engine was running rich, so there's all this black stuff on it and I was wondering if anyone would know what to use to clean the pistons and side walls with with out damaging anything. anything will help, thanks.

[4seasons69]

if you have access to a hot tank they work wonderfully

[Gvr-4]

no I dont, I was thinking about using s razor blade and slowly cut it, but dont want to damage the pistons.

[4seasons69]

if you do that be really careful not to gouge them or scratch them. carb cleaner and plastic scrapers might work to be on the safe side

[Goat Blower]

A screwdriver and then a wire wheel on a drill. Just put some grease around the edges to catch the gunk then wipe it off when you're done. It's not that easy to scuff the pistons, with all the heat and abuse they take, they're not exactly soft.

[Super Bleeder!!]

Thermite.

[Andrew7dg]

+1 on the wire wheel and brake cleaner

[Constant_Project21]

Soak them in gas, and a wire wheel.

[Gvr-4]

thanks for all your replys, I guess ill grease it up and wire wheel it. thanks again everyone.

[jrohner]

I first went across them lightly with a gasket scraper to get the carbon thinner, then I just sprayed brake cleaner on mine and let it soak a while and then wiped em off. They looked like brand new.