Diff Breathers
Submitted: Tuesday, Jul 15, 2008 at 17:52
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Kroozer
Have seen some Diff Breathers on Ebay for sale, consisting of only hose and 2 inline fuel filters. I have seen this done in magazines and stuff but just wanted to know if anyone thought that there could be any disadvantages or problems with this type of set up. A mate tends to think it would be more harm then good using anything but a proper breather that is set to a certain pressure.
All i know is i will be doing it but sourcing the hose and filters from the local Auto
shop, not paying $50 odd for the Ebay ones.
Reply By: Member - Mark G (NSW) - Tuesday, Jul 15, 2008 at 18:07
Tuesday, Jul 15, 2008 at 18:07
KROOZER; i couldnt see why you cant use a lengh of fuel hose, a good hose clamp,a clean(or new) fuel filter.just allow for
suspension travel with your diff.unless anyone else has a simpler method?
AnswerID:
315462
Follow Up By: Member - Chris R (NSW) - Wednesday, Jul 16, 2008 at 09:14
Wednesday, Jul 16, 2008 at 09:14
Regardless of method used, do not run lines tight to existing metal lines where stones and mud will surely gather and create corrosion - quickly. If you do you will need to check regularly.
In my latest breathers i have made up complete set of hanger/brackets to hold the new tubes at least 12mm away from existing lines. This also allows better long term security of the lines from offroad snags etc - no point to the breather if it has been disconnected.
Cheers
Chris
FollowupID:
581737
Reply By: rumpig - Tuesday, Jul 15, 2008 at 18:09
Tuesday, Jul 15, 2008 at 18:09
i just used the OE breathers off of the front and back diifs, only i ran new lines high up into the engine bay area just under the bonnet and then reused the OE breathers on the end of those lines.
AnswerID:
315463
Follow Up By: Lex M - Tuesday, Jul 15, 2008 at 22:32
Tuesday, Jul 15, 2008 at 22:32
You will probably find the original diff breathers are one way valves which allow pressure in the diff to escape but not allow anything in. If you use these on the end of your raised lines you really haven't helped the problem of a hot diff cooling in
water and sucking
water in through seals and bearings.
FollowupID:
581687
Follow Up By: Kroozer - Tuesday, Jul 15, 2008 at 23:30
Tuesday, Jul 15, 2008 at 23:30
Yeah understand the concept of it all, WHY would you squirt a little oil into the filter if you used Fuel Filters?
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Follow Up By: Lex M - Tuesday, Jul 15, 2008 at 23:36
Tuesday, Jul 15, 2008 at 23:36
Beats me.
Anyone?
FollowupID:
581698
Follow Up By: Member - 120scruiser (NSW) - Wednesday, Jul 16, 2008 at 16:07
Wednesday, Jul 16, 2008 at 16:07
If you use the oe breathers, remove the cap off them and remove the valve and spring inside and then reseat the cap. I have done this on many 4wd's and no probs. I run the rear into the rear wheel arch through a rubber grommet and the front goes high in the engine bay.
FollowupID:
581795
Reply By: Stephen M (NSW) - Tuesday, Jul 15, 2008 at 18:42
Tuesday, Jul 15, 2008 at 18:42
Diff Breathers
When a hot axle hits cold
water it cools rapidly. This has the effect of lowering the air pressure inside the axle and the diff housing, causing air to be drawn in via the diff breathers. Extending your diff breathers higher up the chassis (standard on most Landcruisers and Patrols) with the aid of plastic tubing is a "must do" for regular
water goers. However, it is no guarantee that
water will not enter your diff. The sudden reduction in air pressure inside your diff can still cause
water to be drawn in via your axle seals if the diff breathers do not equalise the pressure quick enough. This is why its still necessary to allow the vehicle time to cool down, even when extended diff breathers are fitted.
Just an explanation of how they work. This was copied and pasted
Below is what you can buy for around $20 and a bit of your time. Regards Steve M
AnswerID:
315468
Reply By: Member - Warfer (VIC) - Tuesday, Jul 15, 2008 at 19:48
Tuesday, Jul 15, 2008 at 19:48
Hiya Kroozer
These are a nice kit but as you see you hav to pay for them
http://www.oztion.com.au/buy/auction.aspx?itemid=3150595
I used the Piranha Diff breather kit @ $60 Bucks and are great !
Cheers
AnswerID:
315485
Follow Up By: Brian (Montrose, Vic.) - Tuesday, Jul 15, 2008 at 21:15
Tuesday, Jul 15, 2008 at 21:15
Those "special air filters" mentioned in that auction are simply air stones for fish
tank oxygenators or ozonator airstones for pools or spas.....
Hmmm me thinks I could make up a set like that from parts fro work....
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581655
Follow Up By: Brian (Montrose, Vic.) - Tuesday, Jul 15, 2008 at 21:24
Tuesday, Jul 15, 2008 at 21:24
I forgot to mention those"filters" are a pain in the ar#$ to clean
debris out of as
well...
FollowupID:
581661
Reply By: Top End Explorer Tours - Wednesday, Jul 16, 2008 at 10:12
Wednesday, Jul 16, 2008 at 10:12
Hey Kroozer.
Extend you breathers both front and rear and Gearbox to the fire wall, put the original breather top back on and fit them in an up side down Power aid bottle cable tied to the fire wall, the power aid bottle acts like a bell I have been doing it for years.
The cost about $20 for the hose and $5.50 for the power aid.
Cheers Steve.
AnswerID:
315564
Follow Up By: Member - Chris R (NSW) - Wednesday, Jul 16, 2008 at 20:33
Wednesday, Jul 16, 2008 at 20:33
I guess a power aid bottle is right up there with other engine performance thingies??
Iv'e been toying with the same bell idea - sort of last resort - would expect that by the time the
water was that deep, the diffs etc would have sucked in as much air as they need.
Cheers
Chris
FollowupID:
581841
Follow Up By: Top End Explorer Tours - Wednesday, Jul 16, 2008 at 21:02
Wednesday, Jul 16, 2008 at 21:02
Not if you stop and smell the roses, then put your hand on the axle hub for 30 seconds without being burnt.
I have done thousands of bonnet deep water Xings with out a problem.
This system works and works
well.
Cheers Steve.
FollowupID:
581851