i was looking into coolant connectors a bit more.

Generally we have 4 connectors on drive unit, 2 on heat exchanger and 2 on inverter manifold.

Heat exchanger - Aluminium, internal diameter 18mm no any marks
Inverter manifold - plastic, internal diameter 18mm, Tesla part numbers 1102191-00-b ...

Jack Bauer wrote: ↑Fri Jul 18, 2025 5:08 pm Does anyone have a part number or source for the coolant quick connectors on the M3 Drive unit?

NW18, had it in my notes for whatever reason. please meassure/verify before ordering.
https://media.araymond.com/raygroup/ima ... EN_Web.pdf

Progress is slow, many small details that are hard to be replicated or i will not replicate them. Working with CAD/Fusion after 20 years of not using these tools is hard.

First issue i am facing is "requirement" of 2 litre of atf oil as it takes considerable amount of space.

3D scan of casting (stator side) created today. Feel free to use them, precision should be 0.05mm.
https://drive.google.com/drive/folders/ ... sp=sharing

Thats great info thanks:) Can someone please add this to the wiki.


I will copy it to Wiki once commented by others, I will also add notes around whole motor, how i disassembled it.


conformal coating


Ahh this is naming i was looking for! I also agree with you that chemicals should be used ...

If someone wants to reference internals of 3D6 inverter with other versions.

Because I desoldered my board i will post few notes for future adventurers:
IMG_0361.jpg
1. To remove board you need to desolder all joints marked in green, total of 51 solder joints. I used just solder iron and solder wick.
2. You need to desolder High Voltage interlock loop marked in orange ...

Jack Bauer wrote: ↑Sun Apr 13, 2025 11:13 am Almost ready for first real prototype from JLC

Dont you miss holes for white plastic stands next to ST1/2/3?
Not sure what is under as i did not desolder my board yet.

Just to confirm, my 3d6 motor has hairpin design.

After bit searching on internet it looks like Damien has 3D6 or 3D7 version.

Newer 4D1 and 4D3 are with new “squared” inverter, relocated filter and pump.


Tesla has description here: https://www.tesla.com/ownersmanual/modely/en_cn/GUID-E414862C-CFA1-4A0B-9548-BE21C32CAA58.html

Wiki with a lot ...

You’re a bit mistaken, there’s no coolant in the m3 drive units. Only atf. The oil pump runs Through a heat exchanger, then into a manifold. this manifold diverts part of the oil through a port that pushes the oil through channels in the stator. the other part of the manifold pumps oil through the ...

I am planing to use Model 3 drive unit in my project as “straight” drive by replacing whole “reduction gear box” part of unit by custom made part.

Stator housing has only flat surfaces as mentioned above by Bratitude. There is only coolant pass through, shaft from rotor, 3 phase cables and coolant ...

aaronmcg wrote: ↑Fri Mar 10, 2023 5:27 pm You ever get this finished, @Christian?

Look into Christians signature for his blog.

I am lurking on this forum for last two years to get enough info to make my first conversion. I discovered this community because of your videos on youtube.

It sad to see you “leaving”, thanks for all your work!