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the oil sending unit doesn't have a bolt . I think you may mean the breather at the back of the block which is the road draft tube and has a hose going down toward the road.
this photo shows the road draft tube at the back of the block
http://i290.photobucket.com/albums/l...r/DSC02653.jpg
this one shows where the oil sender is but it will be different from this
http://i290.photobucket.com/albums/l...r/DSC02654.jpg
can you post some photos??
One sure way to find the leak is to buy a bottle of fluorescent oil dye from NAPA or some other parts store along with a black light they sell. Pour the dye in the oil, drive the car, park it in a dark place and go over the engine with the black light. The dye in the oil will fluoresce under black light so you can trace where the leak is coming from.
I can try to post some photos asap. It is hard to get photos right now because I have her put away in my basement.
posi I.D.??
This is how they tell in Pennsylvania....
https://www.youtube.com/watch?v=rEAHAdxDffk
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