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Is there an o-ring that seals this thing to the valve cover, mine seems to be leaking for some reason. would like to know before I pull it apart again.
I dont know about the o-ring but it's fairly common for the 03 to leak from the hoses that attach to the breather under that plastic cover. If it is, a couple of hose clamps will fix it.
yes, there is an o-ring seal. Remove the two hold down screws (8mm or 5/16" head) and the black plastic filter unit can be pulled up out of the aluminum valve cover.