my Tesla Model S Original (2012-2020) is leaking coolant what to check

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

557 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 diagnostic procedures and repair instructions.

Affected Component

Cooling System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the engine to cool completely before opening the coolant system.
•Wear protective gloves and eyewear when handling coolant and associated components.

Symptoms

•Coolant puddles or stains under the vehicle
•Warning message on the dashboard regarding coolant levels
•Decreased cabin heating performance
•Increased engine temperature readings
•Sweet smell of coolant inside or around the vehicle

Diagnostic Steps

1
Inspect the coolant reservoir for cracks or damage.
2
Check hoses and connections for signs of leaks or wear.
3
Examine the radiator for physical damage or corrosion.
4
Look for coolant stains on engine components or under the vehicle.
5
Use a coolant pressure tester to identify leaks in the system.
6
Scan for any error codes related to the cooling system using an OBD-II scanner.

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
•Pliers
•Screwdriver
•Coolant pressure tester
•OBD-II scanner
•Funnel

Parts Required

•Replacement coolant hoses
•Radiator (if damaged)
•Coolant (Tesla-approved)

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Diagnostic Steps

1
Inspect the coolant reservoir for cracks or damage.
2
Check hoses and connections for signs of leaks or wear.
3
Examine the radiator for physical damage or corrosion.
4
Look for coolant stains on engine components or under the vehicle.
5
Use a coolant pressure tester to identify leaks in the system.
6
Scan for any error codes related to the cooling system using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the 12V battery to prevent electrical issues during repairs.

2. Inspect and Replace Hoses

Tools Required: Socket set, pliers, hose clamps.
Sub-steps:
- Remove any protective covers to access the coolant hoses.
- Visually inspect the hoses for cracks, bulges, or leaks.
- If damaged, use pliers to remove hose clamps and detach the faulty hose.
- Install the new hose, ensuring it fits securely and reattach the clamps.

3. Examine and Repair Radiator

Tools Required: Screwdriver, wrench, coolant pressure tester.
Sub-steps:
- Locate the radiator and check for physical damage or corrosion.
- If leaks are found, use a radiator sealant as a temporary fix or replace the radiator entirely.
- If replacing, drain the coolant using the petcock at the bottom of the radiator.
- Remove the old radiator by disconnecting the upper and lower hoses, transmission cooler lines (if applicable), and mounting bolts.
- Install the new radiator and reconnect all hoses and bolts securely.

4. Refill Coolant

Tools Required: Funnel, coolant.
Sub-steps:
- Using a funnel, refill the cooling system with the appropriate type of coolant (Tesla-approved).
- Start the vehicle and allow it to reach operating temperature while monitoring for leaks.
- Top off coolant as necessary.

5. Final Checks

Tools Required: OBD-II scanner.
Sub-steps:
- Reconnect the 12V battery.
- Use an OBD-II scanner to check for any error codes related to the cooling system.
- Clear any codes and test drive the vehicle to ensure proper operation.