Stage-2 Front Cam Bearing Hole(s)

[XLR8N6]

I have a new 4.1L off-center block and noticed
that the front cam journal has a hole drilled at
the 6 o'clock position and another semi-drilled
hole at the 1 o'clock position (leads towards
the driver's side oil gallery). Setting it up for
hydraulic roller and wet sump.

QUESTION:

- Should the semi-drilled hole be drilled all
the way through to the oil gallery?? TIA.

 

[EightSecV6]

Oil comes into the cam from the 6 o'clock hole, goes around the groove in the cam and exits at 1 o'clock into the lifter oil galley, so YES this hole should be drilled all the way through, it will supply oil to the lifters on the drivers side

 

[JayC]

Also, let me stress this for you.

Make sure your machinist lines the cam bearing hole up with the groove in the cam

If not, bad things will happen.