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Old 06-04-2015, 07:18 PM   #19
Lux
 
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Quote:
Originally Posted by sheekeebut View Post
Well then, now that I've established myself as a paranoid cheapass, I should just shut my trap and clean off this greasy mess.
Haha... don't stress about it too much. Hydrogen gas released by the battery is ventilated. Hydrogen gas is less dense than air, so it will rise up to the bonnet and rapidly disperse. This is a problem more specific to vehicles whose batteries are in confined spaces, such as Mercedes-Benz.

Vaseline, when impregnated into a fabric medium (such as a cotton pad), is highly flammable. Its low melting point of only 37° C allows it to migrate in hot weather. This is an issue for vehicles whose batteries in the engine compartment are enveloped by a thermal insulator that can absorb the runoff. Not a concern for the Yaris, specifically, for its absence of such an insulator.

The melting point for most lithium-based bearing greases is up to 120° C, depending on the formulation.
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Old 06-05-2015, 12:01 AM   #20
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Originally Posted by bronsin View Post
My daughter drives her 2012 Camry ~40k miles a year and has unbelievably bad battery terminal corrosion. My wife drives her 05 Camry ~12k miles a year and has pretty bad BTC.

I drive my 09 Yaris Hatch 5k miles a year and have almost none.

You can PREVENT BTC by coating the terminals with a thick layer of wheel bearing grease.

My daughters car had corrosion all over the battery, all over a nearby computer, and all over the nearby fusebox. The terminals had to be replaced as did the hold downs by the delaer (shes rich! )

Now a year later her terminals are good and clean of corrosion with a good coating to wheel bearing grease on them!
I thought her husband bought her a Toyota SUV to replace the Camry (re 'winter safety' ?). Different daughter, or just kept the Camry and the SUV ?
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Old 06-05-2015, 08:08 AM   #21
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Youre right he did.

But that was some time after the corrosion issue was repaired by the dealer.

Don't worry Im not making any of this up!
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Old 06-05-2015, 09:53 AM   #22
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Tundras

We've had 3 Tundras in our family along with several Toyotas, Scions and the Tundras ALL suffered from inordinate hold-down and terminal corrosion repeatedly. The other Toyotoa problems, not so much.

As others have mentioned, battery cleanliness is paramount in helping stave off this problem, but also not over-filling the battery to avoid corrosion caused by excessive off-gassing is helpful.

In the case of the Tundras being more prone to this than our other Toyota products, since its been all 3 of them which have had this problem Im convinced the grounding system in these trucks is different enough than their cars (weak or poor grounding) that despite best efforts terminal corrosion on Tundras is not preventable.
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Old 06-06-2015, 12:19 AM   #23
nookandcrannycar
 
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Originally Posted by bronsin View Post
Youre right he did.

Don't worry Im not making any of this up!
I know. Just trying to keep up .
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