Contents: Removal ⬇ Installation ⬇
A faulty injector causes loud knocking in the engine. Check at idle speed, disconnecting the injectors one by one. If the knocking disappears after disconnecting the injector, it is faulty. Replace. You can also check at increased idle speed, disconnecting the injectors one by one. If after disconnecting the injector, the engine speed remains constant, this injector is faulty. Check with a pressure gauge (factory work). In case of faulty injectors:
- Knocking in one or more cylinders
- The engine gets very hot
- Power drops
- Thick black smoke
- Increased fuel consumption
Removal
Clean the injection lines with fuel. Disconnect them from the pump and injectors.
Remove the fuel return lines. Unscrew the injector holder.
Shine wave washer, thermal insulator and copper sealing ring.
Clamp the nozzle holder in a vice using soft material pads. Remove the nozzle.
Check the condition and position of the injector needle, wear and damage to the nozzle. Clean off carbon deposits with a wooden spatula.
Warning: Do not use for cleaning sharp, scratchy objects. Do not mix up the nozzles.
The needle should be freely inserted into the nozzle under its own weight.
Installation
Assemble the nozzles and holders together.
Install new sealing rings into the injector holes in the cylinder head.
Install insulators with a smaller diameter towards the cylinder head.
Place the sealing rings on the insulators.
Install the washers on the insulators as shown in the figure (arrow).
Install the injectors together with the holders and tighten to 70 Nm.
Install the fuel lines and tighten the nuts to 25 Nm.
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