I searched for this subject, in the forum, and came up blank. I have a '61 235 in my '53 3100. There is a copper oil line running, from the same fitting that the oil gauge line runs from, around the back of the engine and into a fitting in the head. When I disconnect the line, from the fitting, and turn the engine over the oil shoots out full. But when I disconnect the other end from the head, it doesn't flow nearly as strong. My oil gauge will show 16 psi oil pressure, then drop to zero. Shouldn't I have aprox 45 psi? What I need to know is... What is this line for? And... where can I buy a new copper line. It appears to be 1/4" copper. The oil gauge is new, so I am thinking dirt in the copper lines.
Thanks for the help in advance.
