Loud knocking noises in the engine
| Malfunction | Reason/Remedy |
| Dirt in the fuel system | Replace the injectors. Blow out the fuel lines |
| Incorrectly installed insulators, copper sealing gaskets. Burnt insulators, injector holders. Injector holders tightened with too much torque | Replace faulty parts Install correctly |
| The glow plug rod is broken and burnt | Replace a faulty spark plug |
| Air in the fuel system | Check the tightness of the connections |
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