Confounded by a Slant 6 Crank Case Breather

[Deltic]

On my 74 Plymouth Satellite, this looks like it should just pull off, but so far I haven't managed that. Anyone familiar with how these are removed please?

 

[Hemi Rebel]

Pull harder. The rubber grommet is probably hard as a rock. It will come out.

 

[sleepar]

I have broke one of those getting it off.. give it a squirt of penetrating oil.. a claw hammer and a wrench under it for leverage..

 

[Deltic]

Thanks guys. Popped it off with a bit of effort. It's oem, and was full of oil....possibly been on since 74