What does the Tee connection do? The 1/2” heater hose running off the tee branch goes to the back of the intake manifold. But the new fel-pro gasket completely blocks off the rear water inlet to the manifold. The old factory gasket only had a tiny 1/16” hole to let some coolant thru the back passage of the manifold. Someone told me to punch a small hole in the new gasket or I might create a air pocket in the cylinder head and create a hot spot there. Or get a gurgling sound when I turn the heater on? Others say block it off. What should I do?