Quote:
The silly Seafoam through a vaccum line is not enough!!!! You need a much stronger solvent then wimpy old Seafoam!!! B-12 is as strong as they come. I also would take the plugs out and do the piston soak as recomended. You want to apply the solvents directly to the pistons and you do not want it geting burnt. We want to soak the piston and let the solvent drip into the ring pack area. How much wimpy seafoam do you think gets to the ring pack and piston surface when it is being burnt off almost as fast as it enters. We want cold pistons to allows the solvents time to dissolve or soften these hard sticky deposits. Seafoam will work for mild carbon issues but it will not clean the rings.
I've used Seafoam and B12, and the clouds of smoke left behind in each application tell me that Seafoam is hardly "wimpy."