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Old 07-04-2007, 07:48 AM #46
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Here is an example for those recreational off-roaders who do stream crossings: http://www.fjcruiserforums.com/forum...vent-info.html
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Old 07-18-2007, 11:38 AM #47
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When I did my diff breather extension I put it in the left rear taillight housing. That was a pretty easy spot to locate it as well. Thanks for the pics and part #'s it made it really easy.
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Old 07-24-2007, 07:26 PM #48
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breather mod fuel line type

So I went to an auto parts store and asked for 6 ft. of 5/16" fuel line, the guy asked me if I wanted fuel line for fuel injected cars or for non-fuel injected cars. The fuel-injected version is more expensive, but can withstand higher pressures. The regular fuel line says 50 PSI on it. Which one should I go with?
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Old 07-25-2007, 10:19 AM #49
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Re: breather mod fuel line type

Use the cheap one. Remember, the idea is to vent the air so 1 PSI is even too much.

Quote:
Originally posted by orbit
So I went to an auto parts store and asked for 6 ft. of 5/16" fuel line, the guy asked me if I wanted fuel line for fuel injected cars or for non-fuel injected cars. The fuel-injected version is more expensive, but can withstand higher pressures. The regular fuel line says 50 PSI on it. Which one should I go with?
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Old 07-30-2007, 03:09 PM #50
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Cool

THE Breather mod is prettyy simple for the 2nd gen , i have a 95 runner , and it took me about 10 mins. to do it
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Old 03-14-2008, 12:24 AM #51
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Surfari, you ever find the second breather under the hood?

I have a 4gen(08) and I can't find the second breather next to the engine, either.

Anyway, I paid $5.63 for the Union and $2.68 for the breather online from a Michigan dealer. I got ttwo just in case I have to do the front diff too.
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Old 04-25-2008, 10:35 AM #52
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Right can I ask a potential stupid question here too...

I thought the idea with diff breathers was to allow the diff to breathe "IN" during water crossings - the theory being:

You're banging along and your diff is warm/hot (depending on how much of a hard time it's getting from ya!) then you come to a (Brrrr) cold stream and in you go... Now the diff gets a cold bath, this causes the "reverse" of the "hot gas venting" effect ie. the inside of the diff cools and contracts, and you get water into the diff because

a) the factory breather is underwater

and / or

b) the breather is "one-way" and slams shut, but the laws of physics win and pressure sucks water in through the axle seals.

THE POINT TO ALL THIS - if you fit the original "one-way" breather to the end of the extension and mount it higher up, you haven't really done the full job?

Yes or no? I'm asking not telling!

Shouldn't the end of the extension be doubled over and fitted with a bit of screen or a "two-way" filter etc.

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Old 04-25-2008, 10:56 AM #53
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Ahhh whoops just realised that I read one page of this thread, then hit the POST REPLY...

Have now read the other THREE pages too!!

Seems that someone ran a tee off their newly installed diff breather line, and fitted a "cone"(?) filter. Also, the part number quoted is for a cap that IS different to the original breather plug. Different HOW - in appearance or in operation (ie. two-way not one-way)?

Sorry if I'm over complicating things!
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Old 07-12-2008, 10:56 AM #54
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I just did my breather mod this morning using both of the parts that have been listed several times. The breather was diff but a breather is a breather right? anyway I just ran mine up to the gas filler but didn't poke it through like some I just secured it to the fuel line running down to the tank. So if I ever trade it in Nobody is asking any crazy questions about the breather sticking through the gas door.
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Old 01-01-2009, 12:27 PM #55
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strange section for this enhancement?

Thai or other mods-would this sticky make more sense being in "Off Roading Stuff" ?

it seems to be asked quite a bit and I never would have believed it is in

"Accessories" if I had not seen it myself.

Just a thought....not tryin to be a duck...you know what I am trying to spell
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Old 03-19-2009, 07:53 AM #56
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Something else to think about...at least in the 4th gen 4runners, there are 1 to 2 breather tubes in the engine bay, on the driver's side of the engine block. If you have a V6, then you should have 2 breather tubes (with silver caps). If you have a V8, then you should have only one. The transmission and transfer case do NOT have breather extension. They have breather caps just like the rear axle. So, Toyota only extended the front differential...the other stuff is for your weekend projects!

Here is some good info on the FJ forums: http://www.fjcruiserforums.com/forum...ather-mod.html

I would highly recommend the above mod(s) if you go off-roading a lot or do mudding/river crossings.
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Old 03-19-2009, 07:55 AM #57
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Quote:
Originally posted by Run'n'Gun
When I did my diff breather extension I put it in the left rear taillight housing. That was a pretty easy spot to locate it as well. Thanks for the pics and part #'s it made it really easy.
Yup, in my opinion, this is a better location than the typical gas filler location.
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Old 08-24-2009, 12:38 PM #58
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Here is an example of the breather valve clogged with mud: http://www.fjcruiserforums.com/forum...vent-info.html

Here is what can happen, along with steps to change out the oil in the diff:

http://www.fjcruiserforums.com/forum...ntial-oil.html

http://www.fjcruiserforums.com/forum...ial-fluid.html

Very interesting reads.
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Old 08-25-2009, 03:08 AM #59
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Quote:
Originally Posted by Thai View Post
Yup, in my opinion, this is a better location than the typical gas filler location.
I check my cap each time I get gas. I wouldn't be able to do that is it's tucked in my rear light cavity.
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Old 08-25-2009, 07:50 AM #60
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Quote:
Originally Posted by yabedude View Post
I check my cap each time I get gas. I wouldn't be able to do that is it's tucked in my rear light cavity.
But, why do you need to check it so often?? Since either location is away from mud/water, there is no need to check it much at all. Do you check the breathers for your front diff, transfer case, and auto tranny everytime you put gas in your truck?

I just don't like the gas cap location much because one can spill gasoline on the area often (i almost inevitably spill gasoline around the area everytime i put gas in my cars)...although this may not damage anything, but i wonder if the gasoline may rot the plastic tube over the long haul????
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