NewHilux.net

by **david allan** on Sat, 03 May 2008 2:38 +0000

Been looking at installing some front & rear diff breathers.

What are people's thoughts on them.
Is there a big benefit to putting them in.
Has anyone had problems with & without them.

Got a quota from ARB to install them which will be put into the engine bay. They also install a couple of fuel filters for the breathers. Quoted me $250 installed, i think thats reasonable

by **Skeney** on Sat, 03 May 2008 3:04 +0000

AAARRR......

Don't do it Dave!

I've just purchased the parts from Toyota (find the part number by searching the forum for diff breathers. There are other articles and you should find the one that mentions the part number. if not pm me) for $30.00!

It's relatively straight forward, a bit fidlley, but doable...

I installed a set in my old 4Runner and am about to on the new lux. I'm waiting for my TJM UBGs and a fumoto sump valve to install all at once. This is definitely one of those do it yourself type jobs that you can do and possibly save yourself a couple hundred bucks...

There are plenty of people a part of this forum who I'm sure would help with advice.

Cheers Skeney, and good luck!

by **Glenn k** on Sat, 03 May 2008 3:22 +0000

david,
i did it my self(rear diff breather) and it cost me about $50 bucks and not even an hour of my time.
it is easy as...
follow rodw instructions on his thread titled rods new rig and go from there.
i bought the cheapest fuel filter i could from repco $5,
the union from toyota i think cost me $6.70 and i went to pirtek and bought 5 metres of 6mm hose and 3 hose clamps and that cost about $40 bucks. i was their cheapest hose that was suitable, still really good quality.
i run the hose up through the chassis rail then up into engine bay.
if you want you could fly me to melbourne and i will do it for you, it will still be cheaper than arb price...haha
Glenn

by **Skeney** on Sat, 03 May 2008 3:34 +0000

Dave,

I believe the toyota part number is- 90404-51026.

Obviously, double check it will fit your model though...

Cheers Skeney

by **Glenn k** on Sat, 03 May 2008 3:39 +0000

it looks like it wont fit, it looks to be to small. thats what i thought when i picked it up, but it fits. you just need a different size spanner to put it on than the one you use to take the diff breather off
Glenn

by **david allan** on Sat, 03 May 2008 3:45 +0000

thanks guys.

lucky i posted the question

what about the front one, is it also easy

by **Skeney** on Sat, 03 May 2008 3:46 +0000

Yep!

by **Senirb** on Sat, 03 May 2008 3:57 +0000

what is the whole point with diff breathers?????????

by **Glenn k** on Sat, 03 May 2008 4:02 +0000

senrib,
itis so you dont suck water in through the original breather. you basically extend the breather with a hose so it is higher than any water crossing you will ever do.
when your diff is hot then hits the cold water it tries to equalise pressure by sucking in air but because your diff is under water it will suck water in instead.
hope this anwsers yor question
Glenn

by **Senirb** on Sat, 03 May 2008 4:05 +0000

it sure does. Thanks for that.
With the standard breathers, what depth of water would be a safe height to cross??????

by **Glenn k** on Sat, 03 May 2008 4:21 +0000

it depends really, but going any higher than about half way up your rim for any length of time i would consider risky.
if it is just a small water crossing then should be ok but if the wheels and diff are submerged in water for more than a few seconds i think it would be wise to do, it is cheap insurance really
Glenn

by **david allan** on Sat, 03 May 2008 4:39 +0000

thats exactly what i was thinking.

all the $ we spend on our trucks and not to spend an extra $50 to extend the diff breathers is not wise

by **Skeney** on Sat, 03 May 2008 4:56 +0000

Now you're catching on!

by **rodw** on Sat, 03 May 2008 7:01 +0000

Here is the thread about my rig which includes the part number (see the photo of the existing breathers) and some pics of how I did mine. Cost about $50, same as Glenn.

[URL]http://www.newhilux.net/phpbb/viewtopic.php?t=1406[/URL]

There is also a technical article about this with the part number and a pic of it. I think there is also an earlier thread.

Note the union and the breather threads are not metric but an imperial size.

The other spot to put the back breather is behind a tail light, but I was told that you often get stuck in water on the far bank as you exit a stream. This means the back lights can go under.

One of the easiest mods you can do yourself, Toyota Union, 6 metres of 6mm fuel line, 6-8mm T piece, 4 hose clamps, a cheap fuel filter and a few cable ties.

Rod

by **Skog07** on Sat, 03 May 2008 11:29 +0000

The size of the diff breather thread is 1/8" bsp. It is a standard water/ airline thread. Going to use Festo pneumatic fitting to do mine. And some heavy duty air line.
Skog

by **rodw** on Sat, 03 May 2008 11:46 +0000

Skog,

I think you meant 3/8" BSP. Somewhere I read that brass can react with he diff oil thye use these days. Not sure if this is true, but that's why I used the Toyota Part. I since found out you can get Stainless fittings, so perhaps it might be a good idea to use one of them if you can't get the Toyota union to avoid using brass just in case!

Remember, if you have to go through water and ou don't have extended breathers. you can simply wait till the diff cools down for 20-30 minutes to minimise the risk of water ingress.

Why did I do the breathers as one of my first jobs? Well my old Suzuki had extended breathers as standard. One behind the rear tail light and the other up attached to the top radiator hose and I still got water in the front diff!

Rod

by **Skog07** on Sat, 03 May 2008 1:49 +0000

Rod
Trust me mate it's 1/8" BSP, unless there is a difference between our models. A 3/8" BSP fitting is over half an inch across in the external thread diameter. And a 1/8" BSP fitting measures around 3/8" external thread diameter. Imperial BSP sizes are based upon internal pipe diameters not external thread diameter.
Regards
Skog

by **rodw** on Sat, 03 May 2008 8:05 +0000

Here is the earlier thread:
[URL]http://www.newhilux.net/phpbb/viewtopic.php?t=1536[/URL]

Jason quotes at 3/8". Go to make sur we get the right info out there.

by **rodw** on Sat, 03 May 2008 8:10 +0000

Puting Skog and Jason together, I think the Toyota Part is equivalent to a 3/8" BSP x 1/8" Barbed air hose fititng. You could use 3/8" x 1/4" barb, but you'd probably need thicker (8mm) hose.

by **Trini_hilux** on Sun, 04 May 2008 10:29 +0000

Are these the original air breathers? I think one is the front diff and the other might be transfer case or gearbox. What do you guys think

NewHilux.net

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear

Diff Breathers - Front & Rear