I recently had the engine of my Model M John Deere rebuilt by a local mechanic but was sad to discover that I am not getting any oil up to the valves. After taking the engine off I discovered that I am not getting oil into the reservoir located at the end of the cam shaft. I can see the vertical oil shaft going through the cam bearing and up to the valves, however there is not a hole coming into the cam end reservoir. Should there be a second hole in that cam bearing allowing oil to flow in and up? Where is the inlet hole located? I am worried that the bearing was installed incorrectly. If the oil inlet hole is located at the bottom of the reservoir could I simply drill a small hole through the bearing? Any help or ideas on this would be greatly appreciated.