I'm not sure if the second gen 12v's use these or not. I still have the first gen head and the valve adjustment screws use just a flat blade screwdriver to turn them. Where as the bigger C-series motors I've worked on have the allen head screws in the rockers. Anyone know if they're interchangable? Or maybe the 24V motors use them? or 94-up 12v's? I sure hate having to hold a stupid screw driver still while tightening down the locknut.

 

I know mine still uses a blade screwdriver.

 

I use an off set angle driver, much better than a straight blade.

 

Hmmm well maybe I'll have to find a roasted C-series somewhere and rob it's rockers just to see. Or maybe call cummins? maybe they have them available?

 

I just use my fingers to tighten the flat head screw.That was more than enough torque on them .