Removed my valve cover today for painting and noticed some deterioration on one of the gromets attached to the underside of the head where the spark plugs would go through. When i tried to remove it it has split, and even now still wont come out it seems glued on.

Is this usually a replaceable part or did i just wreck the valve cover, and is it normal for it to be glued?



p.s. its a jdm d15b vtec, if it is replaceable would i just get the washer that fits a d16zc?

thanks