The rubber gaskets get very hard and quit sealing. Cut them off with a utility knife.should be able to get replacements off the dorman rack at napa. You'll break the elbows if you pull on them. Also its important they go back in the same places. One has an orifice for ccv and will suck a ton of oil if not in the right place.
Yah, they are not expensive.
Careful with rear tube, i could not find alternative to replace that rubber, wasted $60 on mopar.
I had great success with using Permatex Super 300 #80057 on valve cover and and on seals around vent tubes. Even used it on hoses for AT coolant lines and on intake manifold gasket, keeps everything leak free, i have nothing but good tings to say about it.