Big oil loss on rear sid

[dansluck]

Werner, I would remove the rear cap and check the clearance with plastic gauge (green) if you can get it. Another option is to use aluminum foil. A strip folded to about 3/8 x 2 inches (measures .002 of an inch thick) in the rear cap. Turn with hand crank just a little to see if it moves. It should not. It should hold with 2 strips and turn with 1 strip. Remove shims as needed. If the thrust is broken in the block check out Berts Model A Store on-line for a bronze rear main seal with thrust. Part # A-6336. Good Luck! Dan in Reno Nedada