Tesla Model 3 Owners & Service Manuals

Tesla Model 3: Penthouse Coolant- Refill

Tesla Model 3 2017-2025 Service Manual / Battery System / HV Battery Cooling System / Penthouse Coolant (Drain and Refill) / Penthouse Coolant- Refill

  1. Perform a penthouse coolant leak test. See Penthouse Coolant Leak Test.
  2. Remove the plugs from the hoses.
  3. Connect the rear powertrain supply hose to the RH side of the HV battery, and the rear drive unit inverter inlet hose to the LH side of the HV battery.
  4. Move the coolant drain to under the motor.
  5. Release the clip that attaches the coolant inlet hose to the heat exchanger.

Penthouse Coolant- Refill

  1. Release the clip and disconnect the coolant inlet hose from the heat exchanger upper fitting.
  2. Attach a coolant fill tube to the coolant inlet hose fitting.
  3. Pump coolant into the hose until back pressure is felt or coolant overflows
  4. Attach the coolant fill tube to the heat exchanger upper fitting.
  5. Pump coolant into the heat exchanger until back pressure is felt or coolant overflows.

Penthouse Coolant- Refill

  1. Fasten the clip that attaches the coolant inlet hose to the heat exchanger.
  2. If the penthouse cover was removed as part of another procedure, inspect the coolant input and output tubes and fittings for leaks.
  3. Remove the coolant drain from under the vehicle.
  4. Install the rear HV battery skid plate. See Skid Plate - HV Battery - Rear (Remove and Replace).
  5. Install the mid aero shield panel. See Panel - Aero Shield - Mid (Remove and Replace).
  6. Connect 12V power. See 12V Power (Disconnect and Connect).
  7. Perform a vacuum refill of the cooling system. See Cooling System (Vacuum Refill).

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