I just replaced the original intake manifold (crossover leak) on my 2002 F-150 5.4L V8 with a Dorman 615-188 intake manifold. The PCV hose connection on the back of the Dorman is smaller than the original, hence a loose hose fit. What's the best way to fix this?

 

You ever figure this out?

I replaced my engine a year back and I'm having the same issue. It's causing me some leaner fuel trims than I'd like and I've rules everything else out.

Considered RTV but I don't know. A lot of guys say the o ring fixes it but that just helps secure it to the intake. Not the PCV Vent hose