Abstract: A hydraulic roller cam follower for an internal combustion engine having an integral cylindrical body including an annular oil receiving exterior groove for receiving oil from the engine oil supply and an enclosed recess opening in the lower end including spaced sidewalls, and a roller having a central bore mounted by a pin extending into the sidewalls of the recess wherein a lubricating oil passage extends through the body from the annular groove through the sidewall and into the recess having an outlet disposed to direct a supply of pressurized lubricating oil to the entrance of the roller bore.