Checking, removing and installing the temperature sensor (Opel Kadett D)

The temperature sensor is located on the cylinder head under the generator bracket.

Removal

Caution: Before removing the sensor, drain the coolant into a container, see p. 3.2.

Unscrew the generator mounting bar and move it to the side.

Disconnect the plug and unscrew the sensor.

Examination

Lower the sensor, tying a wire to it, into a bath of water so that it does not touch the walls. Cool the water with pieces of ice, then heat it on the stove, removing the sensor at certain temperatures and measuring the resistance between the contact tongues, see table.

[Original posted on the website: OpelBook]

0°C	4.8-6.6 kOhm
20°C	2.2-6.6 kOhm
40°C	1.0-1.4 kOhm
80°C	270-380 Ohm
100°C	about 200 Ohm

Installation

Screw in the sensor with a new sealing ring.

Caution: Do not tighten the sensor too much.

Connect the plug.

Add coolant.

Screw on the generator mounting bar. Tighten the V-belt.

Make a test drive. Check for leaks. Tighten the sensor if necessary.