Don’t let a leaking rotor seal in your Tesla motor cause expensive damage! All of the cars with the Tesla “Large Drive Unit” (formerly the “570A” motor) have the fatal flaw of leaking coolant (cars listed below).
This leaking coolant issue will short out the stator (field windings), seize and rust the rotor, and of course, complete destroy the electronics in the inverter.
ALL OF THESE MOTORS NEED THIS MODIFICATION. Plus, this COOLANT DELETE modification is entirely reversible, should you decide to do so.
Our "COOLANT DELETE Tesla Large Drive Unit" will allow the Tesla LDU to operate with the following parameters:
1) Coolant delete to rotor- This is what Tesla is offering, which is the lowest level of “fix”. That rotor does indeed get hot enough in the center to discolor the metal, so I’m not sure that this would be my recommendation, but it does fix the horrific failure modes from a leaking rotor seal.
2) Rotor cooled with oil- Yes, while the rest of the components are cooled with the same G48 or other coolants, the rotor can be specifically cooled with Dextron VI or 212B gearbox oil. Using oil cooling method will require additional parts, at extra cost (oil pump from Tesla Model 3/Y, coolant tank, radiator, and hoses and fittings)
which will provide the following benefits:
which will provide the following benefits:
a. Actual cooling of the rotor!
b. When the rotor seal leaks (and it will leak, eventually), Dextron VI or 212B is benign to the LDU. It won’t destroy the stator, it won’t seize and rust the rotor, and it won’t short out the inverter.
c. No fatal failures!!! If all the Dextron VI or 212B leaked out, you would just have a “coolant delete” motor!
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For the following vehicles:
B - 2015-2020 Tesla Model S and X, Performance versions only, rear drive motor only