This for a friend of mine with a '97 GLT with 160k on the clock. He is experiencing enough crankcase pressure to push out the dipstick. I am familiar with the flame trap on NA cars. What does the turbo use for crankcase ventilation and where is it located? He just had a new rear main seal put in the car and I don't want him to do that job again. I guess his mechanic should have addressed the crankcase ventilation issue first. Any advice appreciated. Thanks.