42
Sl no Symptom Probable Cause Remedy
4 Black Smoke
Poor Compression Pressure
Check / Correct or Replace.
Defective Cylinder head
gasket
Worn Valve and Valve Seat
Valve Spring set
Worn or damaged piston ring
Excessive clearance between
piston and cylinder sleeve
turbo compressor to intake
manifold
Rectify
Restricted air duct from air
cleaner to turbo charger
Rectify
Air leak between Intake
manifold and engine
Retighten manifold Nuts
turbine inlet / Exhaust
manifold joint
Retighten Mounting nuts
Excessive dirt build up on
compressor wheel and or
diffuser vanes
Overhaul at manufacturer authorized
service centre
Foreign body damage on
compressor or turbine
Find out the cause of entry of foreign
particles and rectify.
Turbine housing flap
damaged
Find out the cause of entry of foreign
particles and rectify.
Overhaul at manufacturer authorized
service centre
Insufficient oil supply to
turbocharger
Check and rectify
Air filter clogged Clean/ Replace
Restricted turbo charger oil
drain line
Rectify / Check Quality of fuel
Turbo charger bearing
housing sludge or coked
Overhaul at manufacturer authorized
service centre
Worn Engine Piston rings or
Liners
Replace
Burnt Valves and or Piston Replace
Turbo Charger Piston ring
sealing defective
Overhaul at manufacturer authorized
service centre
Turbo charger bearing
defective
Overhaul at manufacturer authorized
service centre
5
Improper Exhaust
Colour
Improper fuel used Change fuel
Engine oil level not Ok Restore Proper Level