Opel Frontera UBS. Manual - part 2180

6E–293

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.

5. Connect the negative battery cable.

Heated Oxygen Sensor (HO2S)

Removal Procedure

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

D

Bank 1 sensor 1 is mounted on the right-hand front
exhaust pipe.

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6E–294

ENGINE DRIVEABILITY AND EMISSIONS

D

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

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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 two 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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6E–295

ENGINE DRIVEABILITY AND EMISSIONS

Installation Procedure

IMPORTANT:

D

A special anti-seize compound, P/N 5613695, is used
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 in.).

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

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.

6E–296

ENGINE DRIVEABILITY AND EMISSIONS

Knock Sensor (KS)

Removal Procedure

1. Disconnect the negative battery cable.
2. Drain the cooling system.  Refer to 

Draining and

Filling the Cooling System in Engine Cooling.

3. Remove the engine cover.
4. Remove the common chamber assembly.

Refer to Common Chamber in Engine Mechanical.

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5. Disconnect the electrical connector from the knock

sensor.

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6. Unscrew the knock sensor from the engine block.

Installation Procedure

NOTE: Do not apply thread sealant to the sensor threads.
The sensor is coated at the factory and applying
additional sealant will affect the sensor’s ability to detect
detonation.

1. Screw the knock sensor into the engine block.

Tighten

D

Tighten the knock sensor to 20 N·m (177 lb in.).

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2. Connect the electrical connector to the knock sensor.
3. Install the common chamber assembly.

Refer to Common Chamber in Engine Mechanical.

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4. Install the engine cover.
5. Fill the cooling system.

Refer to Draining and Filling the Cooling System in
Engine Cooling.

6. Connect the negative battery cable.