Packard Forum Index » Pre-War (1899-1942)

on the bottom of the intake manifold there is tubing that attach to the 4 runners. Where does the end of the tubing go? It has a cotter pin there at the end.

It's a system to drain excess raw fuel that might accumulate in the intake manifold, it terminates with a ball check valve and the cotter is to retain the ball. If the ball and/or seat is damaged or the ball is missing it's like driving with a vacuum leak so check it with your finger while the engine is idling. The drain system began with the advent of downdraft carburetion but was later found to be unnecessary and eliminated.

thank you for the information