my Tesla Model S Original (2012-2020) is leaking coolant, what should I check?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

523 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 working on the cooling system.
•Disconnect the battery before performing any electrical work.

Symptoms

•Coolant puddles under the vehicle
•Low coolant warning on the dashboard
•Sweet smell of coolant inside or around the vehicle
•Engine overheating during operation
•Decreased heating performance in the cabin

Diagnostic Steps

1
Inspect the coolant reservoir for cracks or damage.
2
Check all coolant hoses for leaks or signs of wear.
3
Examine the radiator for leaks or corrosion.
4
Inspect the water pump for signs of leakage.
5
Use a pressure tester to identify leaks in the coolant system.
6
Check for leaks around the heater core.

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

•Pressure tester
•Socket set
•Screwdrivers
•Pliers
•Torque wrench

Parts Required

•Coolant reservoir (if damaged)
•Coolant hoses (if worn)
•Water pump (if leaking)
•Radiator (if damaged)
•Heater core (if leaking)

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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.

2. Inspect and Identify Leak Source

Sub-step 1: Visually inspect the coolant reservoir and hoses for any visible cracks or damage.
Sub-step 2: Use a pressure tester to pressurize the coolant system and observe for leaks.
Sub-step 3: Check all visible connections for tightness and any signs of coolant seeping.

3. Replace Damaged Components

Sub-step 1: If the coolant reservoir is cracked, remove it by loosening the clamps and disconnecting the hoses. Replace with a new reservoir.
Sub-step 2: If any hoses are leaking, remove the affected hose by loosening the clamps, and install a new hose.
Sub-step 3: If the water pump is leaking, drain the coolant, remove the water pump, and replace it with a new one.
Sub-step 4: If the radiator is leaking, remove the old radiator and install a new one.
Sub-step 5: If the heater core is leaking, locate it under the dashboard, disconnect hoses, and replace it if necessary.

4. Refill and Bleed Coolant System

Sub-step 1: Refill the coolant reservoir with the appropriate coolant type as specified in the owner’s manual.
Sub-step 2: Start the vehicle and allow it to reach operating temperature, monitoring for leaks.
Sub-step 3: Bleed the coolant system to remove any air pockets by running the vehicle with the radiator cap off until coolant flows smoothly.