Don"t touch that bolt

[700rpm]

Originally Posted by Brian T

Ray,
There was a change to the way the pump spring was retained --- SB Feb 30 , the reason was Ford were concerned that if an oil pan was replaced and the spring which originally was clipped to the oil pan (not the pump) and forgotten, the lock bolt once removed, the pump falls down resulting no oil pressure or worse tangled up in the crankshaft.
Only the plug as a pipe thread, a fine thread bolt can be used snugged up lightly.

Brian, I am familiar with that service bulletin, but it says nothing about a locking bolt. As Vince noted, Ford never used a locking bolt for the oil pump on an A.