well, I think it’s some sort of oil return line.
on the drivers side on the head just an inch from the firewalll I have this tube running from the head down into the block along side the manifold (it’s thermo wrapped and everything). only problem is that the fitting that holds it in the head is busted and it keeps popping out.
any idea what it’s function is / if I need it. the obvious answer would yes to keep pressure in the head but then I thought about those open breathing filters and how they must release pressure anyway so it all that important?
thanks guys.