The engine knocks

Checks by the user

  • Fault in fuel lift pump
  • Fault in atomisers or atomisers of an incorrect type
  • Fault in cold start system
  • Wrong type or grade of fuel used
  • Engine temperature is too high
  • Valve tip clearances are incorrect
  • 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
  • Valves are not free
  • Worn cylinder bores
  • Piston rings are not free or they are worn or broken
  • Crankshaft bearings are worn or damaged
  • Piston is damaged
  • Piston height is incorrect
  • Valve spring is broken