well after the turbo rebuild my problem went away for a while. then i drove from kc to va and its back. It keept getting worse so today i loaded up the trailer and picked up the mechanic and with in 2 min he knew the problem. It appears under heavy load i am lifting the heads. he also noticed that the oil temps were extremly high compaired to coolant. so it goes in the shop asap to have new head gaskets/bolts egr and oil cooler replaced.