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Geoff’s Quick Check List for Diesel Engines
 
 
Poor Starting Low Compression Low Cranking Speed
  • fuel shut off   • piston blow by   • wrong viscosity oil
  • throttle closed   • dry cylinder walls   • worn bearings
  • lift pump diapram holed   • valve blow by   • auxiliary gear engaged
  • plugged fuel filters   • decompressors levers on   • battery loose
  • air in fuel lines   • valve clearances wrong  
  • no fuel   • blown head gasket Knocks
  • dirty fuel   • worn bearings   • air in fuel lines
  • defective injectors  
  • dirty fuel
  • poor fuel quality Lack of Fuel   • defective injectors
  • injection pump leaking by   • throttle closed   • poor fuel quality
  • injection timing advanced   • lift pump diapram holed   • injection timing advanced
  • piston blow by   • plugged fuel filters  
  • dry cylinder walls   • air in fuel lines White Smoke
  • valve blow by   • no fuel   • air in fuel lines
  • decompressors levers on   • dirty fuel   • dirty fuel
  • valve clearances wrong   • injection pump leaking by   • piston blow by
  • valves sticking in guides  
  • dry cylinder walls
  • plugged air filter Black Smoke   • valve blow by
  • plugged exhaust / turbo   • air in fuel lines   • decompressors levers on
  • kink in exhaust hose   • dirty fuel   • valve clearances wrong
  • blown head gasket   • defective injectors   • valves sticking in guides
  • cracked head   • injection timing advanced   • blown head gasket
  • worn bearings   • too much fuel injected  
  • seized piston   • plugged air filter Blue Smoke
  • auxiliary gear engaged   • engine overload   • piston blow by
  • battery loose  
  • unburnt fuel
 
 
  • burnt lubricating oil
 
 
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