Factory dust shields have single cooling vent holes that are located next to the tie rod ends. First pic shows brand new Moog ES3667 outer tie rods with square shaped "grease relief" valves on the bottom. Moog pre installed the dust boots with no regard to valve position. Second pic shows grease contacting the inner rotor with less than 1/4" clearance. Besides rupturing, this is another reason dust boots should never be overfilled. As with lower and upper ball joints, position the valves facing inboard towards the engine.