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I have a 1950 Straight 8 Engine and can't find where this stud goes on the block...its 7/16 course Thread with 1/8 pipe thread female end. 2 3/4 long and is hallow through. Here's a picture.
If anyone knows where it goes would be great. I've been searching for pictures and came up with nothing.
http://i210.photobucket.com/albums/b...103_144749.jpg
1/8 npt is usually a sender for oil pressure or an oil pressure switch (or a brake system part if it's not on the engine). Somewhere there is a component mounted with a 7/16 bolt that is into an oil galley...and it is NOT a head bolt since it isnt a grade 8.
Dont you have access to a shop manual that has a picture of the engine OR a picture of an installed engine? Should be able to look for a sender wire or tube.