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CM870 and ISX Engines – 019-019   Engine Coolant Temperature Sensor

Table of Contents

Initial Check
Remove
Install

Initial Check

 TOC

Connect INSITE™ and verify the coolant temperature reading is the same on INSITE™ as the gauge reading.

  
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Remove

 TOC

 WARNING 

Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.
 WARNING 

Coolant is toxic. Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

Drain the cooling system. Refer to Procedure 008-018 in the Troubleshooting and Repair Manual, Signature, ISX and QSX15 Engines, Bulletin 3666239.

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Lift up on the locking tab and pull the electrical connectors apart.

Remove the sensor.

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Install

 TOC

Make sure the new sensor has an o-ring installed.

Lubricate the o-ring with clean engine oil.

Install the new sensor into the engine. Tighten the sensor.

Push the connectors together until they lock.

Torque Value:  14  n.m  [124 in-lb]

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Fill the cooling system and operate the engine to check for leaks. Refer to Procedure 008-018 in the Troubleshooting and Repair Manual, Signature/ISX/QSX15 Engines, Bulletin 3666239.

Monitor the engine coolant temperature sensor with INSITE™ for proper operation.

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Last Modified:  27-Jun-2002
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