Thanks again for the assistance!
Cheers

I assume that the orientation of the oil feed stud orifice makes no difference?

Thanks David. I was hoping that was the case. I have found the parts on Drags and will order them up. Cheers!

I have stripped the Threads on my 1945 NH 350 oil feed stud (see pics). What would you recommend as the best way to repair? I believe the stud is 1/4". Drill it out? Weld in a replacement 5/16"? Suggestions?

Hi Robin,
Did .010" work well for your ring gap? Just getting ready to do mine (1947 350 OHC).
Cheers

Happy New Year,
New compression rings (3) have arrived. Ariel manual states ".006 to .008" ring end gap for new rings. I'm assuming this is per inch of cylinder bore? Any advice is much appreciated.
Cheers!

This is a profile pic of my 350 piston, which utilizes 3 compression rings. It is the reason I am switching my later model oil pump for an earlier one. The later model pump seems to overload the oil system..

So where would one find a smaller bore oil pump? Draganfly does not carry them, rather they offer to rebuild and supply the larger bore pump.

I have cleaned it and successfully blown air through it. It appears to be working properly. I'm assuming you mean the spring ball valve which feeds the the big end? I believe this engine does not have the oil pressure adjuster.

Thank you for the reply. I feel like I might be getting to the route of my problem here. I initially disassembled the motor because my oil pressure gauge was reading at the maximum, fearing that the big end oil passage was blocked, or that the oil purifier plug was full of sludge. Neither seemed to ...