Toyota Rav4 EV Forum

Replace battery coolant
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Author:  tgreene [ Sat Aug 04, 2018 4:17 pm ]
Post subject:  Re: Replace battery coolant

KurtManz wrote:
TonyWilliams wrote:
I've never flushed the coolant. I've advocated getting the correct "PH paper" to test your coolant, which prevents unneeded and wasteful flushing and replacement: ... trips.html

Hi Tony,
I bought these strips, but have never used them before.
Any tips on what to do or not to do?

Is it as easy as open the cap for the coolant, dip the strip, pull it out, wait a few minutes, compare the color to the table on the side of the bottle?
What's considered good vs bad?

I have also used the pH strips, and they are pretty easy to use as you describe.

That said, I do worry that they may not test a parameter that is important for electric cars (but not oil burners): I'd think that you'd want the coolant to be low conductivity. That said, you'd think that high alkalinity (high pH) would correlate with high conductivity. High acidity / low alkalinity tests 'bad' on those strips.

Author:  KurtManz [ Sun Aug 05, 2018 5:39 am ]
Post subject:  Re: Replace battery coolant

I dipped the strips.

Results are: 2014 tested august 2018, about 38K miles on it.

Both blues came out with fp/bp at max... I suspect whatever consumes glycol doesn't exist in the EV?
Both blues came out with reserve alkalinity of 6.6 = OK

the Pink came out with fp/bp at max, but with reserve alkalinity of 3.2 and Ph of 9. it's within the "ok" bar but it's starting to become basic.

Does anybody else have any tests or results on theirs? It'd be good to see what is 'normal' for other drivers and spot when something starts to go abnormal.

Image here:

Author:  ggodman [ Mon Mar 02, 2020 4:33 pm ]
Post subject:  Re: Replace battery coolant

Found this for link for anyone looking

Crap your right was for the older models removed link.

Author:  dstjohn99 [ Mon Mar 02, 2020 4:57 pm ]
Post subject:  Re: Replace battery coolant

ggodman wrote:
Found this for link for anyone looking

You got me excited with this, then I realized this is for the earlier EV model (1997-2003) not our 2012-2014 models.

I'm scheduled to take mine to Toyota of El Cajon (TEC) today. $310 labor for the main batter coolant change. I picked up the coolant earlier for $27 per gallon (50/50 diluted) from Toyota online. I was surprised there were different prices depending on what dealer you purchase from. I purchased from and picked mine up at TEC to save shipping charges. They charge $35 per gallon with the service, so I'm glad I bought mine in advance.

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