Patent ID: 7510053
Filing Date: 2009-03-31
Classification: F01M

Abstract:
1. In an internal combustion engine block having a continuous cylindrical oil passage between the interior and exterior of said engine block, said passage having a smooth interior wall terminating in an exterior end face, said passage having a right circular cylindrical groove being less than 30 millimeters from said exterior end face of said passage, a plug comprising three main portions including a first portion having a closed end face at one axial end of said plug, a second portion including a continuous circular cylindrical sidewall portion having sealing means thereon for engaging said smooth cylindrical passage in oil-tight relation, and a third portion including an axially remote skirt portion subdivided by four axial slits into a pair of portions each having a radial flange for engaging said exterior end face of said passage and a pair of portions each having a radially extending locking tab for engaging said circular cylindrical groove, whereby said third portion can be grasped and snapped into said cylindrical groove, said plug not requiring any rotary motion to be seated in said oil passage.