i recently replaced the motor in my 01 f250. as i was tearing the old one down to get some parts off to sell, i pulled the exhaust manifold by the head and oil poured out. about 1/4 quart off the driver side alone. im thinking that my turbo may have went tits up on me but when i put the turbo on, the impellers were solid with no play on each side. are they blown seals or could it be worse? i have another turbo that came with the newer engine but i thought my old one might be better. should i swap them out?