I have some questions regarding the functioning of vehicle rubber body mounts in general, & specifically, rear cab mount bushings for Chevy K1500 series pickups having conventional two door cabs.
I have included a rapidshare link to a GIF image of an exploded view drawing for reference here...Referring to the drawing=85
Part # 58 =3D Upper rear rubber cab mount bushing or cushion Part # 59 =3D Lower rear rubber cab mount bushing or cushion Part # 60 =3D Round steel retainer that goes under the lower rubber cab mount bushing Part # 61 =3D Cab mount bolt
You can see that the upper rubber cab mount bushing (58) sits on the top side of a steel support bracket that is integral with the vehicle frame. The upper rubber bushing is integral with a steel portion of the bushing. A round / oval shaped steel portion of the upper cab mount bushing extends downward from the underside of the bushing. The downwardly extending steel portion of the upper bushing fits through a hole in the frame support bracket.
The lower rubber cab mount (59) is installed under the frame support bracket, a round steel retainer (60) is positioned under the lower rubber bushing, and a cab mount bolt (61) is used to secure the system to the vehicle frame. The cab mount bolt is torqued to approximately 55 foot pounds.
Regarding the steel portion of the upper rubber bushing which extends down from the underside of the bushing, is this portion of the upper bushing supposed to =93bottom out=94 on the round steel retainer (60) which is installed under the lower bushing, when the cab mount bolt is torqued down ? Are the two steel components supposed to be in contact with each other when the bolt (61) is torqued down ?
I would appreciate any feedback.