I was reattaching the oil lines to my oil filter housing after painting it and noticed there is a small copper pipe behind the oil intake line that comes out of the block and back into a boss of some sort. I was just curious what it does/is as I can't seem to find it in the shop manual or FAM.

Thanks in advance!

Chris
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mystery pipe

Chris


G.O.T. (Good Ol' Truck), 1953 Chevy 3609 AD 3/4 ton with original 216 c.i. engine, 4 speed transmission, stake bed