TM 10-3930-669-34 3. EXCESSIVE ENGINE OIL CONSUMPTION AND/OR BLUE SMOKE (CONT). KNOWN INFO TEST OPTIONS Missing oil plugs Visual inspection. POSSIBLE PROBLEMS REASON FOR QUESTION Cylinder head components If cylinder head, valve, valve faulty. guide or seals are faulty, oil Piston oil control ring(s) faulty leakage will result in excessive Front and/or rear oil seal(s) engine oil consumption. faulty. KNOWN INFO TEST OPTIONS Missing oil plugs. Visual inspection. Cylinder head components OK. REASON FOR QUESTION POSSIBLE PROBLEMS If piston oil control ring is faulty, Piston oil control ring(s) faulty. oil leakage will result in Front and/or rear oil seal(s) excessive engine oil faulty. consumption. 2-34 (Para 3-3). (Para 3-13 or 3-3).