PERKINS PARTS AUSTRALIA +++over 30,000 parts
PERKINS PARTS AUSTRALIA +++over 30,000 parts

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Blue Smoke from my engine???

Blue Smoke from my engine???

We do get asked a lot about what does the colour of smoke from my engine mean?

So we put together our smoke analyser :-

Why does my Diesel engine blow black smoke?

 Black Smoke: It indicates poor and incomplete combustion of the diesel fuel.

 – Block air filter or intake system

  • – Problem with fuel injector pump or injectors
  • – Engine timing out
  • – Low cylinder compression (i.e. cylinders, piston rings, ring grooves)
  • – Restricted induction system
  • – Excessive carbon build-up in combustion and exhaust spaces
  • – Incorrect valve clearance

Why does my diesel engine blow blue smoke?

 Blue Smoke: is an indication of oil being burnt.

 – Low cylinder compression (i.e. cylinders, piston rings, ring grooves)

  • – Worn oil rings – sticky oil rings when cold.
  • – Worn valve guides or seals
  • – Cylinder head pooling oil, valve oil drains blocked /sludge and poor PVC valve, similar to valve stem seal problem – called the “sludging” issue. A common issue on later model engines past 2003
  • – Cylinder glazed
  • – An incorrect grade of oil (e.g. oil too thin, and migrating past the rings)
  • – Fuel dilution in the oil (oil thinned out with diesel)
  • – High engine oil level

Why does my diesel engine blow white smoke?

 White Smoke: occurs when raw diesel comes through the exhaust completely intact and unburned

  • – Faulty glow plugs
  • – Low engine cranking speed
  • – Problem with fuel injector pump or injectors
  • – Incorrect injection timing (could be a worn timing gear or damaged crankshaft keyway).
  • – Fuel air leak
  • – Low cylinder compression (i.e. cylinders, piston rings, ring grooves)
  • – Incorrect valve clearance

Check out the video here