Newbie here, I have a Thomas 243 with a Deutz oil cooled (BF4M 1001 F) It has started smoking, only a slight amount then progressed as if you were pouring oil into the exhaust, white with a motor oil smell. I have removed the turbo and muffler. The inside of the muffler is coated with thick oily residue, the air intake side of the turbo is clean, the exhaust side is coated with oil and the inside of the exhaust manifold also has oil in it. I am mechanical, but have never attempted any work on a diesel. Any thoughts as to where the oil may be coming from, my first thought is valve seals?? Replace some on dodge years ago. Looking for friendly advise. dave--ohio