Contents: Removal ↓ Installation ↓
Heat-protective sealing ring
Arrow points to the cylinder head.
Warning: When testing the fuel injectors, never place your hands or any part of your body under the jet of fuel coming out of the injector. Fuel comes out of the injector under high pressure and can penetrate your skin. It is recommended that you have a professional perform the pressure testing of your injectors.
To determine a faulty injector, you need to make sure that the engine is in good condition and the compression level is the same in all cylinders.
Start the engine and warm it up to normal operating temperature.
Loosen the fuel line nipple nut on the injector being tested. Note whether the engine speed has changed.
If the fuel injector is in good condition, there will be a clear decrease in engine speed, accompanied by uneven operation. If the injector being tested is faulty, the change in engine speed will be insignificant and the extraneous knocking noise will disappear, if it was present before.
The following deviations in engine operation indicate the presence of a faulty fuel injector:
- cylinder misfires;
- knocking in one or more cylinders;
- engine overheating;
- reduction of engine power;
- thick black smoke comes out of the exhaust pipe;
- increased fuel consumption;
- blue smoke when starting a cold engine.
Removal
Warning: Keep the area clean when working with fuel injectors.
1. Clean the area around the fuel injectors and fuel line union nuts.
2. Unscrew the union nuts and remove the high pressure fuel lines as a set.
3. Unscrew the fuel injector holders and remove the fuel injectors from the engine.
4. Remove the heat-protective sealing ring.
Installation
1. When installing the fuel injectors, a new heat-protective sealing ring must be used. The ring must be installed with the conical side facing upwards, see Fig. Heat-protective sealing ring.
2. Install the fuel injectors.
3. Install the fuel injector holder, making sure the bracket is positioned correctly on the support
[The original text is available on the website www.VWmanual.ru]
4. Install the high pressure fuel lines and tighten the union nuts to a torque of 25 Nm.
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