1. Intake & Exhaust Components
Engine
Intake & Exhaust
Systems
Intake & Exhaust Components
After/Inner
Cooler
Intake
Manifold
Air to Air or
Intake Valve
Coolant to Air
Turbocharger
Exhaust Valve
Intake Restriction
Indicator
Air filter
Exhaust Manifold
How it all Works together
Renault M9R Diesel Engine

2. Air to Air Aftercooler operation
Engine
Intake & Exhaust
Systems
Air to Air Aftercooler operation
Heat exchanger cools and condenses the intake air.

3. Air to Air Aftercooler operation
Engine
Intake & Exhaust
Systems
Air to Air Aftercooler operation
Heat exchanger cools and condenses the intake air.

4. Air to Air Aftercooler operation
Engine
Intake & Exhaust
Systems
Air to Air Aftercooler operation
Heat exchanger cools and condenses the intake air.

5. Air to Air Aftercooler operation
Engine
Intake & Exhaust
Systems
Air to Air Aftercooler operation
Heat exchanger cools and condenses the intake air.

6. Air to Air Aftercooler operation
Engine
Intake & Exhaust
Systems
Air to Air Aftercooler operation
Heat exchanger cools and condenses the intake air.

7. Water to Air Aftercooler operation
Engine
Intake & Exhaust
Systems
Water to Air Aftercooler operation
Engine Coolant out F F F F
Engine Coolant in
Heat exchanger cools and condenses the intake air.

8. Turbochargers and Roots Blower
Engine
Intake & Exhaust
Systems
Turbochargers and Roots Blower
(Air Pumps)
Turbine
(Exhaust Side)
Bearing Section
Compressor
(Intake Side)
Roots Blower
Gear or Belt Driven
Turbocharger
Driven by Engine Exhaust

9. Turbocharger Air Flow Out to engine In from Air Cleaner Out to exhaust
Intake & Exhaust
Systems
Out to engine
Pressure oil to lube bearings
In from Air Cleaner
Out to exhaust
Oil drain back to oil pan
In from engine

10. Engine Intake & Exhaust Systems Turbocharger Waste Gate:
limits amount of boost by “dumping” exhaust gasses.

11. Dry or Cartridge Air Cleaner
Engine
Intake & Exhaust
Systems
Air Filters
Oil Bath Type
Found on Vintage Equipment
Dry or Cartridge Air Cleaner
Filter Media
Dust is trapped by oil in bottom of filter
Dust Unloading Valve

12. Air Cleaner Restriction Indicator
Engine
Intake & Exhaust
Systems
Air Cleaner Restriction Indicator
Click to show increased filter restriction
Push this button to reset

13. Particulate Matter Filter
Engine
Intake & Exhaust
Systems
Exhaust System
Rain Cap
Particulate Matter Filter
Muffler
Exhaust Pipe

14. White Smoke white smoke
White Exhaust Smoke consists of a large number of
particles of fuel oil larger than 1.0 microns in
diameter. This indicates that the “Fuel is not
Burning.”

15. POSSIBLE CAUSES White Smoke
1) faulty ignition pump 2) too high injection pressure or faulty injection 3) improper grade/delivery of fuel 4) incorrect engine value timing 5) engine overheating or too cold, coolant entering combustion chamber and/or water in fuel 6) high exhaust back pressure

16. POSSIBLE REMEDY White Smoke
1) set injection timing 2) check emission system operation 3) check fuel injection pump calibration 4) check injection nozzles 5) check fuel being used 6) check engine valve timing 7) check cooling system for overheating, head gasket leakage, and/or fuel tank and filters 8) check exhaust back pressure

17. Blue Smoke blue
Blue smoke consists of a large number of fuel oil particles about 0.5 microns in diameter or less. These particles are recondensed droplets of unburned fuel or incompletely burned fuel. This indicates that the engine burns excessive oil; and/or indication of “Lubricating Oil” being burned.

18. POSSIBLE CAUSES Blue Smoke
1) engine crankcase oil level too high 2) wrong grade/type of fuel 3) oil level in air cleaner too high 4) air cleaner oil too light in viscosity 5) worn piston rings, valve guides or cylinders 6) turbocharger/blower defective

19. POSSIBLE REMEDYS Blue Smoke
1) check oil in crankcase and air cleaner 2) try another grade of fuel 3) perform compression test 4) check rings and/or valve seals 5) check turbocharger/blower

20. Black or Gray Smoke smokey
Black or Gray Smoke consists of particles of carbon formed when fuel is heated in oxygen lean regions in the combustion chamber.
Part of the fuel in the chamber is not being ignited or burned.

21. POSSIBLE CAUSES Black or Gray Smoke
1) faulty injection pump timing 2) too high injection pressure or faulty injection nozzles 3) clogged or damaged air intake filter 4) improper grade/delivery of fuel 5) incorrect engine valve timing 6) engine overheating 7) high exhaust back pressure 8) poor cylinder compression

22. POSSIBLE REMEDYS Black or Gray Smoke
1) set injection pump timing 2) check emission system operation 3) check fuel injection pump 4) check injection nozzles 5) check fuel being used

23. MORE POSSIBLE REMEDYS Black or Gray Smoke
6) check engine valve timing 7) check cooling system for overheating 8) check air intake filter 9) check exhaust back pressure 10) check compression

24. compression check