Land Rover Repair: Series I Coolant Temperature Sensor replacement, coolant temperature sensor, poor fuel economy

Question
Hi John

Thanks for your contribution to this website. You have saved me a fortune in mechanic bills.

I have been battling with poor fuel economy, stalling and a bunch of other symptons and by process of elimination I have figured out that the culprit is the coolant temperature sensor.

I have bought a new sensor but before getting my hands dirty I just wanted to ask if there is anything I need to know before removing the old one. Can I just take it out or do I need to drain the coolant or take any other precautions??

Regards
Mark

Answer
Hi Mark,

I'm glad I can help.

Here is the LR text on the subject of replacing the sensor in a series I Disco:

THERMOSTATIC SENSOR
Service repair no - 19.22.18
Remove
1. Disconnect Lucar connector from sensor.
2. Remove sensor.
Refit
3. Clean sensor.
4. Apply Loctite 405 to threads of sensor.
5. Fit sensor and tighten to 15Nm
6. Connect Lucar to sensor.
7. Top-up cooling system.

Make sure the vehicle is cool to the touch before doing any work on it.

There is a diagram but it's nothing to get excited about (artist's rendition).  Send me an email if you want me to send the entire tech sheet.

Regards,

JohnMc
jmcinnis64@hotmail.com