Your spark plug tube seals need replacing - but you have to do the rocker cover gaskets at the same time.
Part numbers you need are; Rocker Cover Gaskets - 13294AA053 x 2 Rocker Cover Bolt Washers - 13271AA071 x 10 Spark Plug Tube Seals - 10966AA030 x 4 The total RRP of all that is $121.41.
how would i go about replacing the spark plug tube? is it very difficult?