340 Oil Priming Question First Start
Alright, here's what the oiling holes look like on the shaft.....
When viewing the assembly from the front of the engine, the hole with the banana groove is pointing slightly towards the outboard side of the engine since it is not centered. The banana groove is especially important here with hydraulic lifters because of the lack of lash that allows oil to circulate around the shaft when the valves are closed (solid lifter). With hydraulic, that moment of rest does not occur because of your preload and the oil has a harder time getting between the shaft and rocker.
That groove has to be located there because it is the point of the rocker that gets loaded the most when the valves are being opened. The other hole is located inboard and feeds the arm area of the rocker. It is a timed event and a little oil finds it's way into the rocker as the rocker hole passes the shaft hole. This keeps the adjuster lubed.
Like I said before, it looks like you have the wrong shafts for your application (one big oiling hole)
Take a real close look at the insides of all of your rockers.....If you see evidence of galling or grooving, best to replace everything. If the rockers are awesome, you can get by with a good set of shafts.
PM @Rocket He has had some shafts for sale in the past.
Good luck
Any questions, just ask.
Alright, here's what the oiling holes look like on the shaft.....
When viewing the assembly from the front of the engine, the hole with the banana groove is pointing slightly towards the outboard side of the engine since it is not centered. The banana groove is especially important here with hydraulic lifters because of the lack of lash that allows oil to circulate around the shaft when the valves are closed (solid lifter). With hydraulic, that moment of rest does not occur because of your preload and the oil has a harder time getting between the shaft and rocker.
That groove has to be located there because it is the point of the rocker that gets loaded the most when the valves are being opened. The other hole is located inboard and feeds the arm area of the rocker. It is a timed event and a little oil finds it's way into the rocker as the rocker hole passes the shaft hole. This keeps the adjuster lubed.
Like I said before, it looks like you have the wrong shafts for your application (one big oiling hole)
Take a real close look at the insides of all of your rockers.....If you see evidence of galling or grooving, best to replace everything. If the rockers are awesome, you can get by with a good set of shafts.
PM @Rocket He has had some shafts for sale in the past.
Good luck
Any questions, just ask.