Ford replaced the leaking intake manifold on my 4.6 several years ago. Now the fitting for the heater hose is leaking slightly, the fitting the hose attaches to. My question is is the fitting screwed in like a pipe fitting or is it some kind of press fit. If it can be screwed in I will take it out and put thread sealer on it. I do not want to break the plastic intake. It is not the hose leaking it has been replaced.