Removal and installation injectors (Opel Vectra A)

Faulty injectors can cause a loud knocking noise when the engine is running and damage the bearings. If the injectors are faulty, start the engine and loosen the union nuts on the injectors one by one. The disappearance of the knocking noise will indicate a faulty injector. Faulty injectors can also be detected at accelerated idle speed. If the speed does not change when the union nut on the next injector is loosened, then this injector is faulty. In addition, the operation of the injectors can be checked using a special pressure gauge (in the workshop).

Signs of faulty injectors:

• absence of ignition;
• knocking in one or more cylinders;
• engine overheating;
• loss of engine power;
• increased fuel consumption.

17YD 1.7L engine

Removal

Clean the injector lines.

Disconnect the pipes; loosen the union nuts with a slotted spanner, for example Hazet 612-17x19.

Caution! Do not bend the pipes!

Disconnect the drain pipes.

Unscrew the injectors using a 27 mm socket wrench, for example Hazet 450.

Remove the shaped washer, heat shield and copper sealing washers.

Installation

Install a new sealing washer under the injector.

Install the heat-shielding sleeve so that its smaller diameter faces the cylinder head, i.e. downwards.

Install an additional copper sealing washer onto the heat shield sleeve.



Insert a new shaped washer into the heat-protective sleeve with the recess facing up (the arrow in Fig.23-041 points to the cylinder head).



Screw in the injectors and tighten to a torque of 70 Nm.

Tighten the injector pipes to a torque of 25 Nm.

1.7L turbocharged TC4EE1 engine

Removal

Remove the intake manifold. Disconnect the high-pressure pipes by unscrewing the union nuts with a slotted spanner, such as Hazet 612-17x19.

Caution! Do not bend the pipes!

Loosen the drain pipe lock nuts and remove it.

Unscrew the injectors using a special Opel KM-728 key.

Remove the shaped and sealing washers.

Installation

Place a new sealing washer and a new shaped washer on the nozzle hole.



Insert the nozzle into the hole so that the mark 1 (see fig.D0860) on the injector coincided with mark 2 on the cylinder head.

Tighten the injector clamps with a special Opel KM-728 key to a torque of 50 Nm. Hold the injector with a wrench.

Caution! Do not rotate the injector. The marks on the injector and cylinder head must match.

Install new gaskets on the drain pipe and tighten it to a torque of 35 Nm.

Connect the pipes and tighten the union nuts to a torque of 25 Nm.

Replace the sealing gaskets on the inlet pipes and tighten the pipe mounting bolts to a torque of 30 Nm.