well, im almost positve it is the seals because it would idle like it had a miss and would run like shit after the swap, pulled the plugs and they were fouled with oil and no longer good, put new plugs in ran like a champ for a couple of minutes, then ran like shit again, pulled those plugs and they were the same as before. i havent had time to do a compression test yet, but if the new turbo was bad , why would it cause my plugs to keep fouling