The function of the camshaft is to control the opening and closing of the valve. Camshaft design is very critical in the engine design process.
QSB5.9 camshaft is for Cummins QSB Series 6 Cylinder mechanical engines. When you have to replace the camshaft, then you may need to replace the parts below:
Valve Tappets
Push Rods
Rocker Arm Assy
Upper Gasket Kit
Lower Gasket Kit
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