Patent ID: 6135080
Filing Date: 2000-10-24
Classification: F01L

Abstract:
A valve guide insert for use on a cylinder head having an upper surface and at least one runner extending below the upper surface, the runner having a roof, the cylinder head further having an aperture for accepting a valve guide, the aperture extending from the upper surface down to the roof of the runner, the valve guide insert comprising:a valve guide body having a first end and a second end, an aperture adapted for accepting a stem portion of a poppet valve and an external surface, the external surface of the valve guide body near the first end being of a size adapted for insertion of the first end into the aperture in the head at the roof of the runner, the valve guide body further including an enlarged portion, the enlarged portion is larger than the aperture at the roof of the runner of the head, the enlarged portion located between the first end and the second end of the valve guide body; andtensioning means for providing tension to the valve guide body, the tensioning means being located near the first end of the valve guide body and adapted for increasing the tension against the head, so that a tension load is introduced on the valve guide body by using the tensioning means to pull on the first end of the valve guide body when the enlarged portion engages the head about the aperture in the head.