my Tesla Model S Original (2012-2020) is losing coolant where is it going

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

548 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 loss in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures 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 vehicle to cool before opening the coolant reservoir to avoid burns.

Symptoms

•Coolant warning light illuminated on the dashboard
•Visible coolant leaks under the vehicle
•Decreased cabin heating performance
•Frequent need to refill the coolant reservoir
•Overheating of the battery or electric motor during operation

Diagnostic Steps

1
Inspect the coolant reservoir for cracks or leaks.
2
Check hoses and connections for signs of wear or damage.
3
Use a coolant pressure tester to identify leaks in the cooling system.
4
Examine the water pump for signs of leakage or failure.
5
Inspect the radiator for corrosion or punctures.
6
Review the vehicle's software for any fault codes related to the cooling system.

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

•Coolant pressure tester
•Socket set
•Leak detection dye
•Flashlight

Parts Required

•Replacement hoses
•New coolant reservoir
•Water pump (if necessary)
•Tesla-approved coolant

Related Faults

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Diagnostic Steps

1
Inspect the coolant reservoir for cracks or leaks.
2
Check hoses and connections for signs of wear or damage.
3
Use a coolant pressure tester to identify leaks in the cooling system.
4
Examine the water pump for signs of leakage or failure.
5
Inspect the radiator for corrosion or punctures.
6
Review the vehicle's software for any fault codes related to the cooling system.

Solution

1. Preparation

Gather tools: coolant pressure tester, socket set, leak detection dye, and flashlight.
Ensure the vehicle is parked on a level surface and the engine is cool.
Wear gloves and safety goggles.

2. Inspect and Replace Hoses

Sub-steps:
1. Locate all coolant hoses connected to the reservoir, water pump, and radiator.
2. Check for cracks, bulges, or loose connections.
3. If damaged, loosen the hose clamps and remove the faulty hose.
4. Install a new hose, ensuring it fits securely and tighten the clamps to the manufacturer’s torque specifications (usually around 10-15 inch-pounds).

3. Replace the Coolant Reservoir

Sub-steps:
1. Disconnect the battery by removing the negative terminal to avoid electrical shock.
2. Drain the coolant from the reservoir by opening the drain valve (if equipped).
3. Remove the retaining bolts and disconnect hoses from the reservoir.
4. Install the new reservoir, ensuring all connections are secure.
5. Refill the cooling system with the appropriate Tesla-approved coolant.

4. Test the Water Pump

Sub-steps:
1. Locate the water pump and inspect for signs of leakage.
2. If leakage is present, disconnect the battery again.
3. Remove the water pump by loosening its mounting bolts and disconnecting the electrical connector.
4. Replace it with a new unit, ensuring proper alignment and torque of bolts.

5. Final Inspection

Sub-steps:
1. Reconnect the battery and start the vehicle.
2. Monitor the coolant level and check for leaks around all replaced components.
3. Perform a pressure test again to ensure system integrity.