Abstract: A spark plug boot keeper assembly interconnects between a spark plug boot and an internal surface of a surrounding structure which defines an elongated spark plug well. A pivoting member of the assembly is located above an annular upper shelf of the internal surface and a circumferential lower rib of the boot. When the boot is properly seated on the spark plug, the lower rib engages the upper shelf. Once engaged, the pivoting member pivots to lock the boot onto the spark plug. The pivot axis lies within an imaginary plane disposed perpendicular to a centerline of the elongated spark plug well.

Abstract: A spark plug boot keeper assembly interconnects between a spark plug boot and an internal surface of a surrounding structure which defines an elongated spark plug well. A pivoting member of the assembly is located above an annular upper shelf of the internal surface and a circumferential lower rib of the boot. When the boot is properly seated on the spark plug, the lower rib engages the upper shelf. Once engaged, the pivoting member pivots to lock the boot onto the spark plug. The pivot axis lies within an imaginary plane disposed perpendicular to a centerline of the elongated spark plug well.

Abstract: A sparkplug boot keeper assembly interconnects between a heat shield and an ignition wire boot of a spark plug. A spring clip is pre-assembled internally to the heat shield which then engages a bottom portion of the spark plug after the spark plug is threaded to a head of an engine block. During assembly, as the heat shield moves axially inward over the spark plug, the pre-assembled spring clip rasps over a hexagonal portion of the spark plug and snap fits to the bottom portion. An outward facing surface of the boot is engaged to a compressed spring which in turn is engaged to an outward wall of the heat shield. Either a rotation, or an axially outward withdrawal force placed upon the heat shield, will radially expand the spring clip permitting disengagement of the heat shield and spring clip assembly from the stationary spark plug.

Abstract: A spark plug connector (10) includes a cap (22) that mounts a terminal (30) for relative rotation with respect to a lock body (50) and outer heat shield (12). The lock body has an oval opening (58) aligned about a snap ring (48) of the terminal. When the cap member and terminal are in one rotated position, the snap ring is allowed to expand and be either installed or disconnected from the spark plug post (20). The oval minor axis is dimensioned such that when the cap and terminal are rotated approximately 90°, the snap ring abuts the lock body (50) about the oval opening and is prevented from expanding to lock the terminal (30) to the spark plug post (20).