HOW TO CHANGE TEMP SENSOR SUBARU LEGACY

Introduction

This tutorial will guide you through the process of replacing the coolant temperature sensor on a 2003 Subaru Legacy. This task is essential for maintaining your vehicle's engine performance and preventing overheating. The steps outlined here can also apply to other Subaru models.

Step 1: Gather Necessary Tools and Materials

Before you start, make sure you have the following tools and materials ready:

• New coolant temperature sensor
• Teflon tape or RTV sealant
• Socket wrench
• Rags or cloth for cleanup
• Safety gloves (optional)

Step 2: Locate the Coolant Temperature Sensor

• The coolant temperature sensor is located at the back of the engine.
• Ensure you have good visibility; you might need to adjust your position or use a flashlight to see clearly.

Step 3: Remove the Old Temperature Sensor

• Use your socket wrench to carefully unscrew the old sensor.
• Be prepared for some coolant to spill out; have rags handy for cleanup.
• Once loose, continue turning the sensor until it comes out completely.

Step 4: Prepare the New Sensor

• Apply a small amount of Teflon tape or RTV sealant to the threads of the new coolant temperature sensor. This will help create a better seal and prevent leaks.

Step 5: Install the New Temperature Sensor

• Position the new sensor above the opening and carefully insert it.
• It can be easier to come from the top of the engine for better access.
• Turn the sensor until it is securely tightened, but be cautious not to overtighten.

Step 6: Clean Up and Test

• Wipe off any spilled coolant with your rags.
• Reconnect any wiring that may have been disconnected during the process.
• Start the engine and allow it to reach operating temperature, then check for leaks around the new sensor.

Conclusion

Replacing the coolant temperature sensor on a Subaru Legacy is a straightforward process that can help maintain your vehicle's performance. Remember to always use proper sealing materials to avoid leaks and ensure a secure fit. If you experience any issues, consult a professional mechanic for further assistance. Happy driving!