| That line is for a top oiler for the rocker arms that someone has added 
its not a bad idea. Ford's used it a lot more than Chevy, they oiled 
better than ford did
Robert Baird
Kent S. Butler wrote:
>I have a line that is coming out of the oil filter that I can't identify.  I 
>have looked through the service manual, factory assembly manual, etc.  I am 
>working on a 216 engine with the beehive type oil filter canister.
>   
>  There is one line that comes out of the bottom of the canister and runs to 
>the engine just above the oil pan (this one I am okay with).
>   
>  Now, the other line comes out of the top of the oil filter canister and has 
>a "T" fitting (and splits into 2 lines).  One is a rubber hose which runs back 
>to the engine block (I am okay with this line too).  The unidentifiable other 
>line is a copper line which runs back towards the firewall wall and around the 
>value cover and connects into the engine between the 3rd and 4th spark plug 
>(halfway) just below the value cover.  Does anybody have any idea what this is 
>for and where I can find a new one??
>   
>  Thanks in advance for the help,
>   
>  Kent
>  56 Chevy 3100
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