Opel Frontera UBS. Manual - part 2363

6E–488

6VE1 3.5 ENGINE DRIVEABILITY AND EMISSIONS

4. Remove the ECT sensor from the coolant crossover.

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Installation Procedure

1. Apply sealer or the equivalent to the threads of the

ECT sensor.

2. Install the ECT sensor in the coolant crossover.

Tighten

D

Tighten the ECT sensor to 30 N·m (22 lb ft.).

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3. Connect the electrical connector.

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4. Fill the radiator with coolant.  Refer to 

Draining and

Refilling Cooling System in Engine Cooling section.

5. Connect the negative battery cable.

Heated Oxygen Sensor (HO2S)

Removal Procedure

1. Disconnect the negative battery cable.
2. Locate the four oxygen sensors.

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6E–489

6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

D

Bank 1 sensor 1 is mounted on the exhaust pipe
ahead of the right-hand catalytic converter.

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D

Bank 1 sensor 2 is mounted behind the right-hand
catalytic converter.

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D

Bank 2 sensor 1 is mounted on the exhaust pipe
ahead of the left-hand catalytic converter.

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D

Bank 2 sensor 2 is mounted behind the left-hand
catalytic converter.

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6E–490

6VE1 3.5 ENGINE DRIVEABILITY AND EMISSIONS

3. Disconnect the pigtail from the wiring harness.

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IMPORTANT:

The pigtail is permanently attached to

the sensor.  Be careful not to pull the wires out.

NOTE: Do not use a torch to remove an HO2S unless the
sensor is being replaced.  Using a torch could damage the
sensor.

4. Remove the sensor from the exhaust pipe.

D

Because of the expansion and contraction of the
metal in the exhaust system over time, this may be
difficult if the engine temperature is below 48

°

C

(120

°

F).

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Inspection Procedure

All four sensors are identical.  Inspect each in the same
way.

1. Inspect the pigtail and the electrical connector for

grease, dirt, corrosion, and bare wires or worn
insulation.

2. Inspect the louvered end of the sensor for grease,

dirt, or other contaminations.

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Installation Procedure

IMPORTANT:

D

There is a special anti-seize compound on the HO2S
threads.  This compound consists of glass beads
suspended in a liquid graphite solution.  The graphite
burns away with engine heat, but the glass beads will
remain, making the sensor easier to remove.

D

New or service sensors will already have the
compound applied to the threads.  If a sensor is
removed and is to be reinstalled for any reason, the
threads must have anti-seize compound applied.

1. Apply anti-seize compound or the equivalent to the

threads of the oxygen sensor, if necessary.

2. Install the oxygen sensor on the exhaust pipe in its

original position.

Tighten

D

Tighten the oxygen sensor to 55 N·m (40 lb ft.).

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3. Connect the pigtail to the wiring harness.
4. Connect the negative battery cable.

6E–491

6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Intake Air Temperature (IAT)

Sensor

Removal Procedure

1. Disconnect the negative battery cable.
2. Remove the engine cover
3. The IAT sensor is located in the intake air duct, behind

the throttle body.

4. Disconnect the electrical connector from the IAT

sensor.

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5. Remove the IAT sensor from the intake air duct by

using a rocking motion while pulling the sensor.

Installation Procedure

1. Install the IAT sensor into the grommet in the intake

air duct.

2. Correct the IAT electrical connector.

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3. Install the engine cover.
4. Connect the negative battery cable.

ION Sensing Module

Removal Procedure

1. Disconnect the negative battery cable.
2. Disconnect the ION sensing module connector.
3. Remove the bolts and the ION sensing module from

the common chamber.

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Installation Procedure

1. Install the ION sensing module on the common

chamber with the bolts.

Tighten

D

Tighten the ION sensing module to 4 N·m (35 lb
in.).