As I move very slowly toward getting this engine running, I have come across a damaged thread on the #6 exhaust valve rocker arm.

I have chased the threads and they work smoothly, but I am wondering if I would be foolish to reinstall this piece.

In the MPC it is listed in Group 0.429 as Screw, Valve Rocker Arm Adjusting, Part Number 837385. (If I need to replace it, is there a new part number for a replacement part?)

Supposedly the engine is either new or was rebuilt. It certainly looks clean inside from what I have observed...but what would cause this type of damage to the threads? Is it possible that they were just defective from the factory?

Thanks,
Nick
Attachments
#6 Exhaust Valve Adjuster.JPG (261 KB, 77 downloads)

Nick
1940 KC Model 1/2 Ton Pickup Project
(with '37-'39 Bed and what we think is a '42-'46 Frame)
Taos, New Mexico