Tesla Model 3: Platter Enclosure Coolant (Drain and Refill)

SPECIAL TOOLS

Drive Unit Pressure Test Fixture (1053600-00-C)

Kit, Coolant Leak Test Adapters, Model 3 (1132185-00-B)

Kit, Coolant Drain & Fill Adapters, M3 (1133843-00-A)

Kit, Svc Plug, Cooling Hose, Model 3 (1135762-00-A)

Kit, Battery Coolant Drain and Fill (GSN-TL-000564)

Drain

1. Disconnect 12V power. See 12V Power (Disconnect and Connect).
2. Remove the front HV battery skid plate. See Skid Plate - HV Battery - Front (Remove and Replace).

3. Remove the lower clips (x3) that attach the lower rear edge of the LH wheel arch liner to the body, to allow access to the coolant hose.
4. Position the coolant drain under the front LH corner of the HV battery.

5. Release the clips that attach the battery to chiller hose to the body.

6. Disconnect the battery to chiller hose at the LH side of the vehicle, plug the female fitting of the hose, and allow the battery to drain.
7. Connect the coolant pressure test adapter to the battery to chiller hose male fitting.
8. Connect the drive unit pressure test fixture to the coolant pressure test adapter.
9. Close both valves P1 (inlet) and P2 (outlet) on the test fixture, and connect a compressed air supply line.
10. Fully close the regulator, and then open P1 (inlet valve)
11. Set the pressure regulator of the test fixture to 26 psi.

12. Disconnect the HV battery return hose at the LH side of the vehicle, plug the male fitting of the hose, and allow the battery to drain.
13. Connect the coolant drain adapter to the female fitting, and direct the tube to the coolant drain.
14. Slowly open P2 (outlet valve) to speed the drain.
15. Wait at least 5 minutes for the coolant to fully drain.
16. Close P2 (outlet valve) when no more coolant is expelled.

Caution:

Though not visible, there is still residual coolant in the platter enclosure cooling system. Consider this fact when servicing the HV battery.

17. Disconnect the air supply from the test fixture.
18. Remove the coolant pressure test adapter and coolant drain adapter from the hoses
19. Perform the service procedures that required the HV battery coolant to be drained.
20. After the components have been replaced, refill the coolant. See Refill.

Refill

1. Perform a platter enclosure coolant leak test. See Platter Enclosure Coolant Leak Test.
2. Remove the plug from the male fitting, and connect the HV battery return hose.
3. Insert a coolant fill tube into the battery to chiller hose male fitting.
4. Slowly pump coolant into the HV battery until it overflows.
5. Remove the plug from the female fitting, and connect the battery to chiller hose.
6. Remove the coolant drain from under the vehicle.
7. Install the lower clips (x3) that attach the lower rear edge of the LH wheel arch liner to the body.
8. Install the front HV battery skid plate. See Skid Plate - HV Battery - Front (Remove and Replace).
9. Connect 12V power. See 12V Power (Disconnect and Connect).
10. Perform a vacuum refill of the cooling system. See Cooling System (Vacuum Refill).

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