Diff Breathers

[matt150 Avid PP Poster! Find all posts View Profile Close matt150]

Has anyone located the manual transmission and transfer breather in a 6 speed man 150 ?

[DGW Senior Member Find all posts View Profile Close DGW]

Hi Matt,

On top of the bell housing behind the enigine. There is a photo at the start of this thread in post 3 for an auto, manual is in the same spot. Bit of a hassle to get at but not too bad and worth extending. This was the longest part when I extended all of mine.

[matt150 Avid PP Poster! Find all posts View Profile Close matt150]

Dave,

I hav failed in stripping the console to get to them from the top. Now, before I have to perform a miracle to reach these breathers on th manal bell housing, have you spotted these on your truck ?

There will be swearing and bloody knuckles, so I need to know they are actually there !

[matt150 Avid PP Poster! Find all posts View Profile Close matt150]

Well, that was a total motherless goat of a job.

I took Dave at his word and dived into the job. I found the breathers mounted on the top of the manual clutch bellhousing and managed to pull the breathers down for access.

Here they are..



Then I took another look from the drivers side and found another bloody breather !. I am thinking there is a transfer case breather, a gearbox breather and the final one might before the bellhousing ? God only knows.. Anyhow I managed to join the first two lines with a tee peice, then I adapted the final (re: in a bastard of a spot !) and routed them all up to another tee peice, and up to my third Caterpillar breather. These big breathers are brilliant, one on its own could manage the entire driveline if required.

Few finished pics, time for a beer cause I am hurting in places I forgot I had !

[gmc2 Lurker Find all posts View Profile Close gmc2]

Thanks heaps hookedon4wding and crisp imag for this info and the detail you supplied in your posts, did the mod today with your instructions and pic's, all went well. Cost me $75 and about 5 hours but that includes moving the fuel breather from underneath up into the Fuel filler cap area. 5 breathers Plus the fuel breather!! D4D auto GXL 2011 Model.

[Warnsie Junior Member Find all posts View Profile Close Warnsie]

Hi sapradogxl

Do you have any further images of your particular breather install (such as the bracket and hoses)? Is it a breather kit?

[vscorsa Member Find all posts View Profile Close vscorsa]

Location of front diff/transfer case breathers

All sorted. Cheers

[SandRunner Member Find all posts View Profile Close SandRunner]

With a planned trip to Walhalla this weekend to give the Prado it's first taste of low range country (and water), I thought I'd better extend the breathers.

Here's my complete guide to doing al 4 breathers.

Rear Diff Breather

The rear diff requires a 1/8" BSP threaded brass fitting with a 1/4" tail barb. Simply unscrew the factory diff breather cap (passenger side of diff), screw the new fitting in, push some 1/4" hose onto the barb and run it to the engine bay. You could run it into the jack area or the fuel filler area but for ease of monitoring and to have them all in the same spot, I ran mine to the engine bay. I then used a small fuel filter on the end. Be sure to leave some slack in the hose near the diff to allow for up and down movement. Easy job, just time consuming to run the hose and cable tie it up out of harms way.


Transmission/Transfer Case Breathers

The transfer and transmission breathers only come up to the bottom of the engine bay. The photo by Crisp Image (below) shows the location of these breathers on top of the transmission bell housing. The easiest way to extend these is to unclip them from the factory location and poke them down under the car so you can access them. They there are two clips holding the breathers in place, one is right near the breather caps and it just pulls off (towards the rear of the vehicle). Then follow the hoses down a bit further to the 2nd clip and pull that off. You will then have enough slack to push the hoses down under the car. Each clip holds the 2 hoses side by side and should come off as one piece.

Once the hoses are under the car, simply pull the existing breather caps off the end and join a piece of hose. I used 1/8" fuel hose and you need about 3/4 of a meter for each one to get them up to the top of the engine bay. I used a plastic 4mm to 3mm reduction joiner to join them. The 3mm end fits snuggly into the new 1/8" fuel hose and the 4mm end fits snuggly into the existing breather hose which is slightly bigger than 3mm. You could just use 3mm barbed joiners but as I said, it's a bit loose in the existing breather hose. Once I'd joined the new hose on, I dropped some string down from the engine bay to the ground, attached the new hoses with some tape and the pulled them up and into the engine bay. Then just put the factory breather caps back on the end of the extended hoses and cable tie it all up.

Font Diff Breather

I then did the front diff breather which already comes up into the engine bay (near the fuse box) but figured it was easy to extend it a bit further right to the top of the engine bay. Simply unclip the hose from the retaining clip, pull the breather cap off, join a new piece of 5/16" hose with a 5/16" brass barbed joiner and then run it up to the top of the engine bay and use the factory breather cap again. 5 minute job max.

I got all of the fittings (including the hose) from Repco and it cost under $50.00. This could be reduced significantly by using a shorter piece of hose for the rear diff and just running it up high at the rear of the car.

I encourage everyone to do this simple mod if intending to do any water crossings. The published wading depth for the Prado is 700mm but the rear diff breather in particular would be well under water at this depth. Once you have all of the fittings, it's a very simple process. I will probably try and source some of the blue filters for the ends of the hoses but the factory ones will do for now.

Any questions, feel free to PM me.

Cheers, Sam.

Excellent instructions. I went to my local and three other Repco stores today to buy the parts required. I could get the hose but none of them sell the connectors. Any suggestions on where I could get them? I also went to Super Cheap and Aussie Auto. Still no good.

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

Don't forget this thread as well (have to say I didn't see this one when I went looking because I went to the Drive Train section). Is it worth merging them???

http://www.pradopoint.com/showthread...Diff-breathers

Sand Runner I bought all my bits from Fittings Express

http://www.fittingsexpress.com.au/page/28404196

Nothing to do with me, just a good little local company that I have used before. They do mail order as well with quite efficient service. I bought hose and fittings from there. I also picked up a cap for the compressor while I was there. Enzed should have the bits too. If you look at the link I posted in the thread I wrote above you will see what Ben has mentioned about the bits you need. For the 1/8" - 1/4" hosetail adapter I bought a 1/8" hose tail to 1/8" male BSP and 1/4" hose tail to 18" BSP female and screwed them together. You will need two for the transfer case breathers.

So confirming there are 5 breathers excluding the fuel tank breather/valve. Rear diff, front diff, gearbox (all 1/4" hose) and two out of the transfer case (1/8" hose). If you use brass hosetails you will need to use clamps.

If you go to ToyoDIT and get to the 150 spec you will see the breathers in the arrangement drawings.

[SandRunner Member Find all posts View Profile Close SandRunner]

OK so let me get this straight.

I need 1/8 fuel hose for the three breathers on the bell-housing and 4mm joiners.
I need 5/16 fuel hose for the front diff with a 5/16 joiner.

Yes??

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

SandRunner only two of the transfer case hoses are 1/8", all the others are 1/4". Actually a bit bigger than 1/8" and a bit bigger than 1/4". Don't know if 5/16" is the size but 1/4" is definitely too big for the transfer case breathers. I have seen a 1/4" hosetail split the smaller hose. Maybe 3/16" if you can find it. I used 1/4" fuel hose up to the new breathers so for the front diff and auto gearbox I used a 1/4" - 1/4" hosetail joiner but you will need a hose clamp to hold the two Toyota hoses on firmly. At the rear diff I used the Camry fuel union which is 1/8" BSP (maybe NPT I didn't check and they are close enough the same) to 1/4" hosetail. Again I used a hose clamp. You will need small clamps to go over the two smaller transfer case breather hoses. I didn't use the usual spiral screw type but grabbed some clamps to suit 1/4" OD hose.

Does that make sense? Some people have just extended the 1/8" hose and not made up an adapter. That thread from the 120s goes into detail of others installs. I just use 1/4" fuel hose up to the new breathers so I don't have to get anything special for one or two breathers.

[SandRunner Member Find all posts View Profile Close SandRunner]

Ok this clears things up a little thanks. So the third breather on the bell housing (auto??) is a 1/4"?

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

Yes. Two are 1/8" and one is 1/4".

These are 1/8"



This one is 1/4"



They all sit in the same bracket.

Images are off ToyoDIY so mods if that breaches any copyright please delete.

Michael

[SandRunner Member Find all posts View Profile Close SandRunner]

Thanks mjrandom. I extended my rear and front diffs this morning before work. Very easy quick job those two are. I went to Pirtek and bought the hose and brass fittings to do this and the three on the bell housing. When I get a bit more time I will attack those on the bell housing. I think they will take a little longer.......

[SandRunner Member Find all posts View Profile Close SandRunner]

Well, finally got the last of the breathers done yesterday morning. Not that hard at all when following these instructions. Thanks guys. But there is no hope in hell I will be able to replace the hoses to the factory plastic clips on top of the transfer box or bell housing. Zip ties will have to do.

Did anyone get the hoses back into the factory clips after doing the extensions??