D4400 Injector

Changing out an injector. The new one will not seal tight. I have the nut tight but the injector still has some play in it where the pen is pointing. Any ideas? Have a new cork gaskets under the washer. Thanks John

Check for a thread problem....that nut looks kind of buggered up and may be bottoming out before closing the gap.

Thanks OM, tried it without the cork gasket and it sealed. So took some fine sandpaper and scrubbed the gasket on it to thin it down and guess what? It is now in place and tight. Now if I could only get that dang #$%@**&^ pony moter to start I might be in bussiness LOL. Thanks, John