Rocker cover assembly for engines

Abstract

A rocker cover assembly for an engine is disclosed. The rocker cover assembly includes a base member, a cover plate, and at least one fastener unit that attach the cover plate to the base member. The base member includes fastener-receiving portions, each of which has a step between a first section and a second section. The second section includes an insert-receiving portion. The cover plate includes fastener holes axially aligned with the fastener-receiving portions of the base member. Each fastener unit includes a retaining insert, a push nut, and a threaded fastener. The retaining insert is fixedly attached to the insert-receiving portion. The push nut is co-axially positioned with the bore within the first section and against the step, to limit a travel of the push nut towards the second section. The threaded fastener includes a head section, a threaded section, and an extended shank section.

What is claimed is: 
     
         1 . A rocker cover assembly for an engine, the rocker cover assembly comprising:
 a base member including a service window and a plurality of fastener-receiving portions structured on the service window, each of the plurality of fastener-receiving portions including:
 a bore defining a first section, a second section, and a step, the step being disposed between the first section and the second section, wherein the second section includes an insert-receiving portion; 
   a cover plate including a plurality of fastener holes, wherein the plurality of fastener holes are axially aligned with the plurality of fastener-receiving portions of the base member;   at least one fastener unit, the at least one fastener unit being adapted to removably attach the cover plate to the service window of the base member, each of the at least one fastener unit including:
 a retaining insert fixedly conformable within the insert-receiving portion of the bore; 
 a push nut co-axially positionable with the bore within the first section and against the step to limit a travel of the push nut towards the second section; and 
 a threaded fastener with a head section, a threaded section, and an extended shank section therebetween, 
   wherein during an assembly the threaded fastener is axially passed through at least one of the plurality of fastener holes and is movable through the push nut to be retained with the cover plate and being further movable to threadably engage with the retaining insert, along an engagement direction.