A little late to this thread, but if you do not have an air compressor you can do the job with parachute cord. Pull all the sparkplugs and using a breaker bar and socket on the crankshaft bolt, bring each piston on the compression stroke as you want to work on it. At the bottom of the compression stroke, feed about 18" of cord into the cylinder. Using the breaker bar, bring the piston up until it stops without applying too much force. The valves springs can now be removed without worry of dropping a valve. After the seal is replaced, simply turn the crankshaft bolt counterclockwise to relieve the force on the valves and remove the cord. Proceed to the next cylinder and repeat the procedure. Use parachute or multistrand nylon cord with the end melted to prevent loose strands from contaminating the cylinder.
Last edited by 1955 1 Series; 04/29/2025 2:04 AM. Reason: Clarity