The Ford Barn

rotorwrench · 11-12-2021, 12:17 PM

1 part ATF to 1 part Acetone is a good mix for a large quantity of penetrant. Take the valves out first. It's going to be a bear without the common flathead tools but it has to be done to confirm it not just the valves that are stuck. A lot depends on how much corrosion is visible on the wall and piston. If it's real heavy then it may require busting the piston to get it out. The cylinder walls can be distorted by beating them out. Sometimes heating the piston and then letting it cool back down to ambient will loosing the crust. If it's not too crusty then find a hickory dowel to whack it with.

Third Generation Automotive took over Roy's business and combined it with theirs.

11-12-2021, 12:17 PM	#4
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 18,006	Re: 1949 Merc 8CM engine 1 part ATF to 1 part Acetone is a good mix for a large quantity of penetrant. Take the valves out first. It's going to be a bear without the common flathead tools but it has to be done to confirm it not just the valves that are stuck. A lot depends on how much corrosion is visible on the wall and piston. If it's real heavy then it may require busting the piston to get it out. The cylinder walls can be distorted by beating them out. Sometimes heating the piston and then letting it cool back down to ambient will loosing the crust. If it's not too crusty then find a hickory dowel to whack it with. Third Generation Automotive took over Roy's business and combined it with theirs.