Abstract: A fixture for positioning internal combustion engine rocker arm pedestals prior to bolting the pedestals to the engine. The fixture is a molded synthetic plastic body having recesses for receiving the rocker arm pedestals and fingers within the recesses maintain the pedestals therein. The fixture also includes positioning surfaces cooperating with engine components to assure proper positioning of the pedestals, and the fixture remains in the engine eliminating the necessity for removing the same after the pedestals are bolted in place.

Abstract: A linear motion absorber for damping linear movement utilizing a cylinder having a reciprocal piston located therein. The cylinder and piston are molded of synthetic plastic and the piston is of an extended length and a diameter slightly less than the inner diameter of the cylinder as to be self aligning therewith and includes a homogeneous annular lip seal to produce unidirectional sealing. The piston stem or rod is also of a synthetic plastic material and in the rigid stem embodiment homogeneously extends from the piston. The piston rod may also consist of a flexible synthetic strand attached to the piston for transmitting tension forces, and a compression spring within the cylinder acting upon the piston will position the piston to a retracted position. The open end of the cylinder is sealed by a removable cap entirely formed of a synthetic plastic material which may be readily affixed to the cylinder to produce a closed circuit during damping.