TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download

Page 274 of 890

REFERENCE INFORMATION NOTE If the exhaust is not colorless it must be either white, blue or black. If exhaust color is: WHITE . . . . . . . . . .Go to fuel system, Paragraph 2-22. Could be injector timing, DS level fault. BLUE . . . . . . . . . . . .Blue smoke is a sign of oil entering the combustion chambers. It usually enters past the piston rings or intake valve stem seals. This is an internal engine problem that can't be handled at this level of maintenance. You may want to run the Engine Mechanical Tests, Paragraph 2-18 before you notify DS Maintenence. BLACK. . . . . . . . . Intake/exhaust. Para. 2-23 TM 9-2320-280-20-1 ENGINE LUBRICATION 2-191