Blue or white exhaust smoke

Checks by the user

  • Wrong grade of lubricating oil
  • Fault in cold start system
  • Engine temperature is too low
  • Too much oil or oil of wrong specification used in wet type oil cleaner

Check by the workshop personnel

  • Timing of fuel injection pump is incorrect
  • Valve timing is incorrect
  • Bad compression
  • Cylinder head gasket leaks
  • Worn cylinder bores
  • Piston rings are not free or they are worn or broken
  • Valve stems and/or guide are worn
  • Piston is damaged
  • Valve stem seal is damaged (if there is one fitted)
  • Lubricating oil seal of turbocharger leaks