Contents: Removal ⬇ Installation ⬇
Damaged injectors can cause severe detonations during engine operation and cause bearing failure. If bearings are damaged, start the engine at idle speed and loosen the union nuts of the fuel lines on the injectors one by one. If the detonations stop when any union nut is loosened, this indicates a defect in the corresponding injector.
A damaged injector can also be identified by successively loosening the union nuts of the fuel lines on the injectors while the engine is running at increased idle speed. If the number of revolutions does not change after loosening any of the union nuts, this indicates a defect in the corresponding injector. A damaged injector can also be identified using a pressure gauge at a service station.
Signs of damage to the injector are:
- No ignition;
- Detonation in one or more cylinders;
- Engine overheating;
- Reduced engine power;
- Excessively black exhaust;
- Increased fuel consumption.
Removal
1. Remove the air filter.
2. Unscrew the mounting bolts and remove the exhaust manifold.
3. Clean the fuel lines.
4. Loosen the union nuts of the fuel lines and remove them as a set.
Pipeline fastening nuts
Do not change the shape of the fuel lines.
5. Disconnect the fuel return lines.
6. Unscrew the injector holder together with the injector using the special OPEL KM-728 tool.
7. Remove the sealing ring and shaped washer.
Injector sealing ring
Installation
1. Place a new sealing ring and a new shaped washer into the injector hole in the cylinder head.
The convex part of the washer should face upward.
2. Insert the injector into the hole so that the mark (1) on the injector aligns with the mark (2) on the cylinder head.
Installation marks
3. Tighten the union nut with the special tool OPEL KM-728. At the same time, hold the nozzle holder from turning with a wrench.
Tightening the injector union nut
The nozzle should not rotate, and the marks should match.
4. Install the fuel return lines with a new gasket and tighten the nut to torque 30 Nm.
5. Install the fuel lines on the injectors and high-pressure fuel pump and tighten the union nuts with force 25 Nm.
6. Install the intake manifold with a new gasket and tighten the mounting bolts with force 25 Nm.
Visitor comments