Breather lines on 2014 GU

So I just wanted to get some clarification on the diff/gearbox/transfer breathers in the newer GUs.
What I can see on mine is the breather lines come up from the various cases into the bottom of the engine bay (see below)
The breather lines are the front 3. I believe the two behind are vacuum lines for the rear locker.
Attachment 62791

From there they go into this plug in the left of the engine bay above the front left wheel arch. With the 2" lift in my vehicle that plug ends up just over 1m from the ground
Attachment 62792

So what happens to them on the other side of there? Are they just open or are there filters or one-way valves attached?
My friend is wanting to do a "river" crossing and I'd like to sort out any shortcoming in the breathers before then.
...and yes, I realise the rear diff needs attention due to it being much lower than the others.

I ran new breather lines and they terminate on the firewall behind the motor
I used 6mm push fittings

Yeah, that's what I was intending to do but I also wanted to double (and triple) check I was looking at the right hoses.
Should I just disconnect the poly section from below the engine and run new stuff from the metal tubing? What do I do with the tubes still attached to the side of the engine bay? Just coil them up tie them out of the way?

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Originally Posted by terra_australis

Yeah, that's what I was intending to do but I also wanted to double (and triple) check I was looking at the right hoses.
Should I just disconnect the poly section from below the engine and run new stuff from the metal tubing? What do I do with the tubes still attached to the side of the engine bay? Just coil them up tie them out of the way?

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Yes. Go to the last joint and extend from there will be fine mate.

OK, I'll have a play on the weekend. Thanks :)

Or cut the tube where ever it suits you and join from there mate. Your never going to remove the breathers so the factory will be obsolete.

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Originally Posted by terra_australis

OK, I'll have a play on the weekend. Thanks :)

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Hi Terra

How did you go with your breathers?

Just awaiting my kit. It's in the post. Hopefully gets here before the weekend.

Good luck with it. :) Do let us know how you get on, I'd be keen to see some photos if you have a chance to take a few.

Kit arrived today. It's the PU hose type with the push fittings.
As soon as I looked at it I wondered how I was going to join that hard plastic tube to the existing lines.
Any thoughts or do I improvise? I was thinking maybe using some barbed joiners for aquarium air hose... looks about the right dimensions.

So here's how it went... Oh, and I should point out I did this when the car was cold. I got up close and personal with the exhaust system at times so would have been a bit unpleasant if the car had been run first.

Original fitting and hose
Attachment 62987

Removed the clip holding the hose and disconnected it.
Attachment 62988

Here's a comparison of the original fitting and the replacement quick connect fitting
Attachment 62989

This is the chassis cross-member that the other end of the original hose terminated into. There's a similar barbed fitting screwed in there too. I removed it but it could simply be left in place.
Attachment 62990

The kit came with 2x straight and 2x angled fittings for replacing the ones on the diffs, the gearbox and the transfer case. I think the angled ones are generally intended to fit to the gearbox and transfer but I ended up going with an angled connector on the rear diff because a) it allowed me to keep the hose well away from the exhaust pipe and b) there's little chance I'll be able to get to the transfer or gearbox ones to replace them. I decided to route the breather hose with the vacuum lines for the diff locker (marked) since they end up in the engine bay next to the other breather hoses.
Attachment 62991

The vacuum lines become slack rubber hoses forward of the rear axle to cope with suspension movement. I simply followed them with the breather hose leaving a similar amount of slack. The flex conduit was simply to stop any friction damage to the poly hose. If it were a rubber hose I would have been happy to leave it unshielded.
Attachment 62992

After that the vacuum lines follow another chassis cross-member to the other side of the car. I decided to go above that cross-member to keep it away from the exhaust pipe on the passenger side. There's a foil insulated pipe that crosses in the same place so I just used that as an extra heat shield.
Attachment 62993

That get's the pipe to the passenger side chassis rail. As luck would have it, there's some plastic clips that carry the metal vacuum lines down the passenger side and there's a spare slot. I used them but cable tied to be sure - plastic clips break eventually.
Attachment 62994

Just behind the front wheel arch the exhaust pipe gets quite close to the vacuum lines. I decided to stay well clear and crossed the top of the chassis where there is a foam-insulated pipe for the A/C system.
Attachment 62995

I just followed the forward end of that to inside the wheel arch and up into the back of the engine bay (pic does not show final position of pipe). This came up right in front of the firewall and I just brought it up leaving a little bit of slack and fixed the filter end at the top near the rear of the engine.
Attachment 62996

Greta write up mate, thanks for sharing.

No worries ;)
I'll add to this when I do the other ones, but they are a much simpler job since I'll be utilising most of the existing pipework.

I have moved your thread into the DIY section mate, keep adding to it, adds to the resource for sure, appreciate the extra time it takes to take pics etc. Good job mate.

The perfect thread for me to follow.
Great effort!

Thanks for post. Which kit did you use?

A great detailed thread with lots of good photo's! Well done!

Has given me the confidence to tackle one of the to-do jobs I was thinking about palming off to the local mech,

Cheers!
-Westie

Do people modify the gearbox and tranny breathers, I've not looked, but read that they are quite awkward to get to.

I was just thinking of buying some tube for my rear diff and running it up into the body rear so it can vent near that air inlet by the rear window. But I've not done any work at looking into that to see if it's possible.

Gearbox and Transfer case are not that hard. Their breathers are joined together. I had to go to Pirtek and get a adapter from memory, so i can adapt the metal breather lines into the plastic breather lines. All 4 of mine go into the engine bay.

Quote:

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Originally Posted by terra_australis

From there they go into this plug in the left of the engine bay above the front left wheel arch. With the 2" lift in my vehicle that plug ends up just over 1m from the ground
Attachment 62792

So what happens to them on the other side of there?

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Yeah, does anyone know what happens to the tubes on the other side ???????

I finally got around to looking at this yesterday and thought, if they go up a little bit higher they'll already be at about the height they'd be if I put them on the top of the firewall.

I'm wondering if there's much advantage to extending these from group of breathers???

The rear breather is a different story.

Quote:

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Originally Posted by 10G

Yeah, does anyone know what happens to the tubes on the other side ???????

I finally got around to looking at this yesterday and thought, if they go up a little bit higher they'll already be at about the height they'd be if I put them on the top of the firewall.

I'm wondering if there's much advantage to extending these from group of breathers???

The rear breather is a different story.

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They just go straight through that rubber and terminate at that height.

Quote:

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Originally Posted by Skitzyrex

They just go straight through that rubber and terminate at that height.

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Oh, thanks for letting me know, much appreciated.