my Tesla Model S Original (2012-2020) has a coolant leak what should I do

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

608 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix coolant leaks in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Cooling System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the coolant reservoir or radiator cap to avoid burns.

Symptoms

•Coolant puddles or spots under the vehicle
•Warning message on the dashboard regarding low coolant levels
•Overheating of the vehicle during operation
•Decreased HVAC performance (heating and cooling)
•Unusual smells of coolant (sweet odor) inside or outside the vehicle
•Increased frequency of needing to top off coolant levels

Diagnostic Steps

1
Inspect the ground under the vehicle for coolant puddles and identify the location of the leak.
2
Check the coolant reservoir level and inspect for any visible cracks or damage.
3
Use a UV dye test to help identify hard-to-find leaks in the cooling system.
4
Visually inspect all hoses, connections, and the radiator for signs of wear or damage.
5
Conduct a pressure test on the cooling system to determine if it holds pressure or if there are leaks.
6
Scan the vehicle's systems with an OBD-II scanner for any related fault codes.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Socket set
•Screwdrivers (flat and Phillips)
•Torque wrench
•Coolant refill funnel
•Pressure tester (for cooling system)

Parts Required

•New coolant reservoir (if applicable)
•Replacement hoses (if applicable)
•Replacement radiator (if applicable)
•Coolant (Tesla recommended type)

Related Faults

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Symptoms

•Coolant puddles or spots under the vehicle

•Warning message on the dashboard regarding low coolant levels

•Overheating of the vehicle during operation

•Decreased HVAC performance (heating and cooling)

•Unusual smells of coolant (sweet odor) inside or outside the vehicle

•Increased frequency of needing to top off coolant levels

Diagnostic Steps

1
Inspect the ground under the vehicle for coolant puddles and identify the location of the leak.
2
Check the coolant reservoir level and inspect for any visible cracks or damage.
3
Use a UV dye test to help identify hard-to-find leaks in the cooling system.
4
Visually inspect all hoses, connections, and the radiator for signs of wear or damage.
5
Conduct a pressure test on the cooling system to determine if it holds pressure or if there are leaks.
6
Scan the vehicle's systems with an OBD-II scanner for any related fault codes.

Solution

1. Preparation

Gather all necessary tools and parts for the repair.
Ensure the vehicle is parked on a level surface and turn off the engine.
Allow the engine to cool before starting any work on the cooling system.
Disconnect the battery to prevent any electrical issues.

2. Identify and Repair the Leak

A. Coolant Reservoir Replacement

If the reservoir is cracked:
1. Remove the old coolant reservoir by disconnecting the hoses and unbolting it from its mount.
2. Install the new coolant reservoir and reconnect hoses securely.
3. Tighten bolts to the manufacturer's specifications (usually around 10-15 Nm).

B. Hose Replacement

If any hoses are damaged:
1. Loosen clamps on the affected hose and remove it.
2. Install the new hose and secure it with clamps, ensuring they are tight.
3. Repeat for any additional hoses that require replacement.

C. Radiator Repair

If the radiator is leaking:
1. Drain coolant from the radiator using a drain pan.
2. Disconnect the radiator from the vehicle by removing mounting bolts and hoses.
3. Inspect and repair (if possible) or replace the radiator.
4. Reinstall the radiator and reconnect all hoses.

3. Refill and Bleed the Cooling System

Refill the cooling system with the appropriate type of coolant (Tesla recommends using their proprietary coolant).
Bleed the cooling system to remove any air pockets. This can typically be done by running the heater at maximum and allowing the system to reach operating temperature with the cap off until any bubbles dissipate.