Trying to get PCV and engine vacuum squared away.
Wondering if there is correct way to get the "blue grommet" off? Do I twist and bend it out or should the rubber grommet just slide right on. Attempted removal but got the feeling I would have to tear it out and eased off. Also wondering if I must take off the valve cover and install that way. So, any tips or directions pointed would be greatly appreciated.
***Black grommet pictured appears to be identical in size.
***1966 Mustang 289