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it's there to "cool" the battery. removing shouldn't adversely affect the battery.
 

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I think that it's more there to vent the possible accumulation of flammable fumes, which the battery may release in small quantities during operation.

I personally might be a bit hesitant to remove the vent without removing the cover as well, but possibility of any negative effects is pretty small.
 

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you can't vent air when it's getting air forced into it.
 

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The air being forced into the compartment is what vents it. Force air in, and the air that's in the compartment gets forced out some other way. If there was no air being forced in and vented out, then how would it cool the battery anyways?
 

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what i meant is that you dont need to bring in air to vent something. what flammable fumes are in the battery compartment? it's there for cooling.
 

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Well, a battery is essentially a controlled chemical reaction. Due to the chemistry involved in a lead-acid battery, if you overcharge it with an excessive voltage, you can hydrolyze the water in the cells, causing it to vent hydrogen and oxygen. A mixture of hydrogen and oxygen is very explosive.

That duct won't do much to cool off the battery. What it will do is introduce just enough circulation to keep the battery compartment flushed of any gasses that may be vented.


:arrow: http://www.mazda3forums.com/index.php?topic=53832.0
http://www.mazda3forums.com/index.php?topic=20096.0


EDIT: Okay, maybe I shouldn't say that it's not there to cool the battery, but keeping the batter compartment clear of hydrogen is a primary function.
 

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in short, take it off if you want. some people can't even keep it with their intakes.
 

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The battery duct is to cool the battery for reliability only! As stated from the Mazda Tech manuals!

It is not to flush or vent gases!

I removed mine along time ago befoer I go the Optima and there was no problems at all.
 

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[quote author=AzMz3 link=topic=67587.msg1170398#msg1170398 date=1169836993]
It is not to flush or vent gases!
[/quote]

lol... this seems to be kind of a sore spot with you, eh?
 

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Discussion Starter #13
[quote author=dmention7 link=topic=67587.msg1170520#msg1170520 date=1169841583]
[quote author=AzMz3 link=topic=67587.msg1170398#msg1170398 date=1169836993]
It is not to flush or vent gases!
[/quote]

lol... this seems to be kind of a sore spot with you, eh?
[/quote]

It seems to be a sore subject with a bunch of people. Thanks for the info anyways. I am probably just gonna leave mine on with the screw undone. That way it takes me no more than 5 secs to remove it when I am in there. It dont matter what it looks like when the hood is closed :)
 

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[quote author=dmention7 link=topic=67587.msg1170520#msg1170520 date=1169841583]
[quote author=AzMz3 link=topic=67587.msg1170398#msg1170398 date=1169836993]
It is not to flush or vent gases!
[/quote]

lol... this seems to be kind of a sore spot with you, eh?
[/quote]

No not at all, just trying to keep false info from spreading since I have the manuals in front of me!
 

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Well, to be perfectly fair, it's not false info. An improperly-charged battery canvery well release hydrogen gas, and hydrogen gas is extremely flammable, and a vent will flush the battery case of any gases that may have otherwise accumulated.

Just because a service manual doesn't explicitly state something, doesn't make it false.
 

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[quote author=dmention7 link=topic=67587.msg1171370#msg1171370 date=1169877657]
Well, to be perfectly fair, it's not false info. An improperly-charged battery canvery well release hydrogen gas, and hydrogen gas is extremely flammable, and a vent will flush the battery case of any gases that may have otherwise accumulated.

Just because a service manual doesn't explicitly state something, doesn't make it false.
[/quote]

And just because you assume something doesn't make it true. As anal as these car makers are about all of the unnessecary parts and lables for them if it was to flush gases I'm sure them would have listed it!
 

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[quote author=dmention7 link=topic=67587.msg1172875#msg1172875 date=1170002051]
But I'm not just "assuming" that batteries can release hydrogen... it's a fact. Unlikely, yeah, but still a real possibility.
[/quote]

As stated you are assunming that is the case. There are some cars that don't have air ducts and enclosed batteries.....where is your theory there.

Anyone can assume what it is made for but having what it is actually made for in writing by the people that made it is alot more believable than your assumptions!
 

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[quote author=AzMz3 link=topic=67587.msg1172887#msg1172887 date=1170002707]
There are some cars that don't have air ducts and enclosed batteries.....where is your theory there.
[/quote]

If the battery isn't enclosed, then there would be no place for hydrogen to build up--engine bays are pretty well ventilated. I could just as well turn that around and say "If that vent is there to cool the battery, then what about the cars with no ducts or covers?" Read a little further to see why I'm not going to use that argument.


[quote author=AzMz3 link=topic=67587.msg1172887#msg1172887 date=1170002707]
Anyone can assume what it is made for but having what it is actually made for in writing by the people that made it is alot more believable than your assumptions!
[/quote]

"My" assumptions, eh? Sorry, I'll stop assuming about the physical reality of the chemical reactions that occur when charging a car battery, and only believe what a manual tells me. Honestly, man, that manual is not the comprehensive, end-all resource for every detail of every function of every part of this vehicle. If it tells me something, I'll believe it. But not at the complete exclusion of things it doesn't tell me.


To be honest, it seems like you're just trying to be argumentative here. If the vent cools the battery by flushing the airspace inside the compartment, then it will also dissipate any hydrogen that may accumulate. Those functions are mutually inclusive! Where's the problem? Or are you trying to tell me that there is no possibility of a battery releasing hydrogen? If so, show me some proof and I'll shut up.


I'm not telling anyone what to do with that vent. I never even said that removing the vent was necessarily a bad thing. If you wanna take it off--fine, there's more than likely no problem at all. But what the hell's so wrong with trying to inform people of a potential concern? It's not like I'm pulling this stuff out of my ass; I'm just reporting the facts here.


Anyways, I've said my peace--I gave the info I wanted to give, and I think I made the point I wanted to make. People can make of it what they will.
 

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[quote author=dmention7 link=topic=67587.msg1173119#msg1173119 date=1170012150]
[quote author=AzMz3 link=topic=67587.msg1172887#msg1172887 date=1170002707]
There are some cars that don't have air ducts and enclosed batteries.....where is your theory there.
[/quote]

If the battery isn't enclosed, then there would be no place for hydrogen to build up--engine bays are pretty well ventilated. I could just as well turn that around and say "If that vent is there to cool the battery, then what about the cars with no ducts or covers?" Read a little further to see why I'm not going to use that argument.


[quote author=AzMz3 link=topic=67587.msg1172887#msg1172887 date=1170002707]
Anyone can assume what it is made for but having what it is actually made for in writing by the people that made it is alot more believable than your assumptions!
[/quote]

"My" assumptions, eh? Sorry, I'll stop assuming about the physical reality of the chemical reactions that occur when charging a car battery, and only believe what a manual tells me. Honestly, man, that manual is not the comprehensive, end-all resource for every detail of every function of every part of this vehicle. If it tells me something, I'll believe it. But not at the complete exclusion of things it doesn't tell me.


To be honest, it seems like you're just trying to be argumentative here. If the vent cools the battery by flushing the airspace inside the compartment, then it will also dissipate any hydrogen that may accumulate. Those functions are mutually inclusive! Where's the problem? Or are you trying to tell me that there is no possibility of a battery releasing hydrogen? If so, show me some proof and I'll shut up.


I'm not telling anyone what to do with that vent. I never even said that removing the vent was necessarily a bad thing. If you wanna take it off--fine, there's more than likely no problem at all. But what the hell's so wrong with trying to inform people of a potential concern? It's not like I'm pulling this stuff out of my ass; I'm just reporting the facts here.


Anyways, I've said my peace--I gave the info I wanted to give, and I think I made the point I wanted to make. People can make of it what they will.
[/quote]

First part was suppose to read there are some batteries that are enclosed!

Glad you got that out!

And as stated the duct is for cooling the battery for reliability per Mazda!
 
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