Why may engine start knocking?

asked 02 Jun '18, 05:28

June 2, 2018, 5:28 a.m.
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  1. Fuel with the wrong octane number for specific (petrol) engine
  2. Too big a piston clearances, worn cylinder liners.
  3. Faults in injection valves, injection too early.
  4. The gudgeon pin or big end bearing having too big clearance.
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answered 02 Jun '18, 05:30

June 2, 2018, 5:30 a.m.
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