Coolant Temperature Sensor/Switch (For Computer): Service and Repair

Temperature sensor engine coolant, replacing

Special tools:
951 2885 Sleeve 951 2885 Sleeve
951 2957 Coolant Reservoir 951 2957 Coolant Reservoir
951 2953 Cover 951 2953 Cover

Note! The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.

Removal

Removal of upper engine cover over cylinder 1, 3, 5 and 7 (bank 1)

Remove:
- the oil filler cap
- upper engine cover over cylinder 1, 3, 5 and 7 (bank 1) by pulling it straight up. Install the oil filler cap.

Removing the air cleaner intake pipe





Remove:
- the 2 screws
- the air cleaner intake pipe
- the expansion tank cap.

Removing protective plate





Note! There is a guide sleeve on the upper mounting for the plate. This must be lifted slightly so that the panel can be slid forward.

Remove the 6 screws.
Lift and slide the protective plate forward.
Remove the protective plate.

Draining coolant
Open the cock on the lower left edge of the radiator.
Drain the coolant into a clean receptacle.
Close the cock.

Installing the protective plate





Install:
- the protective plate
- the 6 screws; tighten.

Removing connectors





Remove:
- the connector of the injectors from the retainer
- the connector; bend aside
- the connector from the retainer; bend aside.

Removing the coolant temperature sensor





Remove:
- the connector from the temperature sensor
- the temperature sensor using 951 2885 Sleeve 951 2885 Sleeve.

Installation

Note! For tightening torques, see: Tightening torque, B8444S [1][2]Specifications.

Installing the coolant temperature sensor

Install:
- the temperature sensor using 951 2885 Sleeve 951 2885 Sleeve.
- the connector to the temperature sensor.

Installing connectors





Install:
- the connector to the injectors
- the connector of the injectors in the retainer
- the connector in the retainer.

Installing the air cleaner intake pipe





Install:
- the air cleaner intake pipe
- the 2 M6 screws; tighten.

Installation of upper engine cover over cylinder 1, 3, 5 and 7 (bank 1)
Remove the oil filler cap.

Install:
- upper engine cover over cylinder 1, 3, 5 and 7 (bank 1)
- the oil filler cap.

Check

Caution! Make sure the outlet hose of filling equipment is not blocked as this could damage the cooling system.

Fill with coolant using filling equipment 951 2957 Coolant Reservoir 951 2957 Coolant Reservoir and cover 951 2953 Cover 951 2953 Cover.
Check the oil level in the engine and transmission. Start the engine and allow it to warm to normal operating temperature. Check for leaks and proper function. Fill up fluids as necessary.