DIY Toyota RAV4 EV Motor Coolant Leak Check

This playlist will show an attempt to rebuild a Tesla "Large Drive Unit" in a Toyota RAV4 EV. This may help you to DIY too! This is the first episode, showing the leaky seal, the potential consequences if you keep driving, and how to check for a leak yourself.
Timestamps
0:00 Intro
0:31 Leak explanation using 3D CAD model
1:14 How to check for a coolant leak
2:41 Outro
See also
sites.google.com/view/teslald...
en.wikipedia.org/wiki/Toyota_...
www.myrav4ev.com
Disclaimer
This video is for entertainment purposes only. All work you do on your car is at your own risk.
Keywords
Toyota RAV4 2012 2013 2014 Mercedes B-class Electric Drive Tesla Model S large drive unit LDU motor BEV glycol coolant fluid Zerex G48 automatic transmission fluid ATF Dexron VI leak battery aegis ring bearing bearings grinding noise CAD model PTFE teflon rotary lip seal failure drain housing rotor shaft repair common mode grounding runout eccentricity fluting wear axial radial play speed sensor check rebuild assemble disassemble vent reluctor ring expensive cheap repair DIY out of warranty

[@VincentKillpastor]

Thank you for creating this channel - I am starting on my nightmare journey using those as a road map)

[@moestrei]

Also important for Tesla Model S with LDU (large asyncron motor) and Mercedes B250e...all suffer from the same issue.

[@Evgeniy123]

Thanks!

[@moestrei]

Nice CAD cut-away and explanation. Periodically......on my Model S i do it now every 10,000km (when swapping around wheels). Now my sensor of my remanufactured LDU (90,000km) has some droplets.....coolant reservoir is still on Max. Decided to order seal (3 seals, 3 lipped as recommended) but keep driving for now as i live out of town and its my only transport. I do 30,000km/a, car has over 380,000km on it. After over a year your seal is still ok? Any idea of how much mileage you can get out of it ? Are there coolant additives available to provide more seal lubrication?

[@diyEVguy]

We are lacking statistical data but look on the website in the description bc it contains mileages on several new seals. Not scientific but yeah. Additives: not that I know of.

[@altechpage]

Have you checked the insulation resistance between the stator windings and the stator housing (e.g. using a megaohmmeter)?

[@diyEVguy]

No. I have no friends that own an insulation tester. They are expensive.

[@moestrei]

​@@diyEVguy I saw on other EV channels that the UNI-T UT-501A was used....below $100.

[@diyEVguy]

@@moestrei thanks for the tip!

[@alexgout]

Dag Landgenoot, I was wondering how did you know there was e problem?

[@diyEVguy]

See my first video :-)

[@alexanderpetrov7027]

Did you find out if the inverters are ok?

[@diyEVguy]

yes they were OK, no flooding, I was in time.

[@pashko90]

Where is no car exists that require zero maintenance, whoever, EVs needs much less of it.