Thread: Breather systems

No, because you'd fill them up with fuel vapour when they sucked in

Ummmm, why?? just run them to atmosphere

I can see your point, but I can't see why you would want to do it.

If you are going to extend the lines - surely the idea is to get them as high as possible, on the back end of the disco they run up the rear qtr behind the light cluster, if the water was that high you would have other issues.

The front is different, but could still be routed into the front pillars, or into snorkels if fitted.

If - and I know it doesn't happen often - but if you had an overpressure in a box or axle and it pumped oil/fluid out the effects to the canister would be terminal.

Then you could also have petrol vapours migrating back to the box/axle - and over time these vapours would brake down the viscosity of the lubricant/fluid.

You can get one way valves - similar to diving snorkels (the swiming ones) - but they need to be checked regularly to make sure the valves are opening and shutting.

On an old vehicle of my fathers - he had a semi inflated bike tyre that acted as an expension 'tank' for air oil/fluids. With any overpressure the tyres were supple enough to expand and accept what was coming it's way.

I think I might try and make up small inexpensive/simple one way valves for this purpose. Shouldn't be too hard

Originally Posted by ladas

I can see your point, but I can't see why you would want to do it.

If you are going to extend the lines - surely the idea is to get them as high as possible, on the back end of the disco they run up the rear qtr behind the light cluster, if the water was that high you would have other issues.

The front is different, but could still be routed into the front pillars, or into snorkels if fitted.

If - and I know it doesn't happen often - but if you had an overpressure in a box or axle and it pumped oil/fluid out the effects to the canister would be terminal.

Then you could also have petrol vapours migrating back to the box/axle - and over time these vapours would brake down the viscosity of the lubricant/fluid.

You can get one way valves - similar to diving snorkels (the swiming ones) - but they need to be checked regularly to make sure the valves are opening and shutting.

On an old vehicle of my fathers - he had a semi inflated bike tyre that acted as an expension 'tank' for air oil/fluids. With any overpressure the tyres were supple enough to expand and accept what was coming it's way.

I think I might try and make up small inexpensive/simple one way valves for this purpose. Shouldn't be too hard

The problem with using 1 way valves is.......well, they're one way

A breather has 2 purposes, to let air in and to let air out, a 1 way valve would prevent one of these from happening

Originally Posted by rovercare

The problem with using 1 way valves is.......well, they're one way

A breather has 2 purposes, to let air in and to let air out, a 1 way valve would prevent one of these from happening

Yes, my wording wasn't too spot on there was it, what I meant was like a snorkel with the inverted top pipe and a ball, so that the air/vapours could come and go as they please - but if water hit the ball it would move upwards and shut the pipe.

Just route the breathers into the air box? which then makes them snorkel height?

I just used the tip in aust 4WD monthly. tapped a larger adapter into the standard hole in the diff, routed 7mm fuel hose from both diffs, gearbox and transfer case breathers to the engine bay and then put a standard fuel filter on the end of each hose(so the diffs can push air out and draw claen filtered air in) screwed all to the firewall using 38mm plumbing brackets to hold the fuel filter itself in place. Make sure you face the open end of the fuel filter downwards in the bracket.

Originally Posted by DRUT

I just used the tip in aust 4WD monthly. tapped a larger adapter into the standard hole in the diff, routed 7mm fuel hose from both diffs, gearbox and transfer case breathers to the engine bay and then put a standard fuel filter on the end of each hose(so the diffs can push air out and draw claen filtered air in) screwed all to the firewall using 38mm plumbing brackets to hold the fuel filter itself in place. Make sure you face the open end of the fuel filter downwards in the bracket.

Pics!!! We need pics!!! If that is ok and all, not wanting to be demanding

Just go down to bunnings and buy the hose for water irragation. They do it the same size as the pipe that already comes from you diffs and gear box.
Just buy some of this, Will cost about $10 for more than enough. Then buy a few conectors at the same time. Then cut the new hose to length and conect to the old pipes (which are behind the engine , and under the back for the rear diff)to the new ones with the conectors you just bought and then take them up the side of you snorkle. Job done with change from $20