[Cocacolakidd]

I have not used it yet myself, but I hear from several others here on the board that "CRC Gasket Remover" does a fine job getting the top of the pistons very clean. Plus the CRC Gasket Remover is Aluminum friendly. You use it like thick paint remover, and repeat a few times per cylinder. Once you are able to hand crank the motor over one would have two cylinders up, and two down. First spread a coating of grease around the edges of the two up piston/cylinder to keep any thing from getting down between the cylinder and piston skirt/side. After all of the cleaning is done on the two up pistons then crank the motor until those two pistons are down, and clean all grease off of the sides of the cylinder walls and wipe the piston tops clean. Then start on the other two.