Extended Breather's

Dewin · Sep 16, 2010

Going to extend the breather's next week and thought I'd try to save some cash by not buying the usual kit's off egay, having searched I noticed most use a lot more pneumatic connections, so I was thinking I might tidy it up and use less. Now I know naff all about these pneumatic connections so ...

Q. Can I use a four way fitting, which would have 3 entry pipes and 1 exit pipe (see pic)?

Any suggestions to a better set-up appreciated

philvy · Sep 16, 2010

Yes, one suggestion:
leave the TB and GB alone. Really.

They heat up a lot more, and much more often. You don't want the fumes of the GB and TB to mix with the ones from the Diffs. Reason:
Oil is the same, EP90, but the gearbox and TB do have higher rpm, thus higher loss, thus higher temperature (amount of oil is the same if you take into account an error factor of 2).
This higher temperature and speed lets the oil degrade different. The fumes will mix, and you will have slightly (read: unnoticable) better oil in GB and TB, but you will ruin your oil in the diffs. Though my oil in the rear diff gets very bad very often, it looks absolutely different than the bad oil from GB / TB / OD.

I do check me diff and GB/TB/OD temps on long runs (german motorways), and the diffs are warm, but I've burnt myself twice checking tb and gb...
(This is based on 2 Sem. material science at the university and experience with my series, before someone asks where I got this from. If it is different for someone, please correct me.)

Furthermore:
Take the axle breathers straight up. My front one exits left of the rad, my rear one exits in the rear left cubby box.
If you want a breather for the boxes, I'd suggest you take it straight up to the seatbox.

I like the idea with the pneumatic fittings and connections, but you dont need any. Just any tube will do (fumes at about 80degC I suppose).

Cheers,
Phil

Griffdowg · Sep 16, 2010

er? am i missing something. fumes will mix? what does it matter if they vent to atmosphere?

Simpler solution, or rather different, run the axles to one T piece and the boxes to another T piece then run the 2 pipes up to the top of snorkel. thats what i have done. these connectors allow you to quickly disconnect the pipe and check for blockages. worth the £££ IMO.

G

The Mad Hat Man · Sep 16, 2010

most peeps extend the pipes individually up to the bulkhead and then extend one up into the snorkle, if yu have one.
I would suggest that the fumes would condense before they would be sucked down

into one of the other items. If extended into the snorkel then the fumes would be "sucked" out by the negative pressure in the snorkel. The pipes would also tend to cool the fumes failry quickly.
Do not extend breathers into the seat or cubby boxes unless yu like the smell of EP90.
Oh - and the Gbox, Tbox and diffs dont have the same oil in them.

Pikey · Sep 16, 2010

I use 3no 2 into 1 connectors both axles to first 2-1 same with gearbox transfer box this leaves 2 single pipes which I connect to a 3rd 2-1 and the final single pipe goes upto snorkel & been a safari snorkel pipe tucks under jubilee clip that holds air intake top on.

Pikey · Sep 16, 2010

philvy said:
Yes, one suggestion:
leave the TB and GB alone. Really.

They heat up a lot more, and much more often. You don't want the fumes of the GB and TB to mix with the ones from the Diffs. Reason:
Oil is the same, EP90, but the gearbox and TB do have higher rpm, thus higher loss, thus higher temperature (amount of oil is the same if you take into account an error factor of 2).
This higher temperature and speed lets the oil degrade different. The fumes will mix, and you will have slightly (read: unnoticable) better oil in GB and TB, but you will ruin your oil in the diffs. Though my oil in the rear diff gets very bad very often, it looks absolutely different than the bad oil from GB / TB / OD.

I do check me diff and GB/TB/OD temps on long runs (german motorways), and the diffs are warm, but I've burnt myself twice checking tb and gb...
(This is based on 2 Sem. material science at the university and experience with my series, before someone asks where I got this from. If it is different for someone, please correct me.)

Furthermore:
Take the axle breathers straight up. My front one exits left of the rad, my rear one exits in the rear left cubby box.
If you want a breather for the boxes, I'd suggest you take it straight up to the seatbox.

I like the idea with the pneumatic fittings and connections, but you dont need any. Just any tube will do (fumes at about 80degC I suppose).

Cheers,
Phil

WTF are you on about??

parts wanted · Sep 16, 2010

just extended my axle breathers, well put new ones back on. Now I am aware of transfer box and gear box breathers, is this right? where are they?

Pikey · Sep 16, 2010

parts wanted said:
just extended my axle breathers, well put new ones back on. Now I am aware of transfer box and gear box breathers, is this right? where are they?

On drivers side of TB & GB they should terminate in the engine bay on the bulkhead behind the engine

parts wanted · Sep 16, 2010

Cheers dude, I will go looking for them tomorrow to check they is in order!

Optimus Prime · Sep 16, 2010

all well and good while they is fumes, but when you turn the engine off, they will cool and condense, and run back from whence they came

Dewin · Sep 17, 2010

Thanks for all the info and suggestion's

much appreciated, I've altered my planned layout accordingly, just hope the rain stay's away tomorrow...

philvy · Sep 17, 2010

The Mad Hat Man said:
Oh - and the Gbox, Tbox and diffs dont have the same oil in them.

But they all get EP90 in, init? It's just that every GB/TB/Diff uses its own for good reason, or am I missing your point?

@ redhand, Mad Hat:
Yep, the fumes would be sucked out if the connector is near the snorkel and connected to it, then it's alright. Didn't know a snorkel is involved tho, so assumed connector somewhere near GB, plus rather long tube from connector, making a nice mixing bowl (small dia, but big "height").

Something I missed ere? Thought a bit its like four engines in different cars using the same oil, if you get my drift....

philvy · Sep 17, 2010

The Mad Hat Man said:
I would suggest that the fumes would condense before they would be sucked down into one of the other items.

Alright, just read this. That's what I mean. Dunt want that, do we?

Dewin · Sep 17, 2010

philvy said:
Didn't know a snorkel is involved tho, so assumed connector somewhere near GB

No snorkel as yet, outlet pipe will be attached to bulkhead.

The Mad Hat Man · Sep 17, 2010

philvy said:
But they all get EP90 in, init? It's just that every GB/TB/Diff uses its own for good reason, or am I missing your point?

Something I missed ere? Thought a bit its like four engines in different cars using the same oil, if you get my drift....

some landies do not use the same oil in the gearbox as the tbox and the diffs. for example Discos use MTF

Extended Breather's

Dewin

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philvy

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Griffdowg

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The Mad Hat Man

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Pikey

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Pikey

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parts wanted

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Pikey

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parts wanted

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Optimus Prime

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Dewin

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