Description 8/16/20v 4age/4afe/7afe – front main seal Oil pump to crankshaft main seal. Suits all A-series engines such as 3ac, 4ac, 4afe, 4age, 7afe and others.   Specifications – Outside diameter to suit (Oil pump recess I.D): 46mm – Inside diameter to suit (crank journal O.D): 32mm