gearbox breather

[V8Dom]

hi
i wish to move my gearbox breather/ mini tank... im running g50/52 box.

are ther eany alternatives to the early factory unit that sits onto of the cross member next to about to be relocated too engine breather box?

thanks dom

[Storer]

Hi Dom

I use the Factory one on my G50/52.

Why are you wishing to change? Christmas present money burning a hole in your pocket?




Paul

[356Speedster]

There's always another option... guess where mine came from

[UltimaCH]

356Speedster said:

There's always another option... guess where mine came from

Gearbox breather porn from some great innovators...

[F.C.]

No brainer:

http://www.ebay.co.uk/itm/Oil-Catch-Can-9mm-Fittin...

[Abbosevolution]

This is what I've mocked up - reasonably happy and very cheap but sticks in my throat a little as everything else on the car has been expensive, almost as if it's not worthy

[Storer]

Steve

Does that catch pot drain back into the transmission from the bottom of the pot?

What are the two pipes going in at the top? Are they both venting 'froth' from the box?


Paul

[Abbosevolution]

Storer said:

Steve

Does that catch pot drain back into the transmission from the bottom of the pot?

What are the two pipes going in at the top? Are they both venting 'froth' from the box?


Paul

Hi Paul - the pipe at the front with the blue bits is the level indicator - the pipe on the right the breather from the box - further behind that and just in view via the brass fitting the vent pipe - it's not draining back into the box - still unsure as its the first part that i've done on the cheap

[V8Dom]

it will need to drain back in... the box doesnt take alot of oil and if some of it is sat in that pot you will starve teh box.

best bet is take off that level tube... use bottom fitting as the drain back in and the top as a breather..

[Abbosevolution]

Cheers Dom will do

[Storer]

I agree with Dom.

My pot has a feed in from box, a vent (piped down to bottom of chassis) and a return from the bottom of the pot to the gearbox.


Paul

[Abbosevolution]

Ok so have slept on this - do we know how much oil is thrown up into the catch tank ? are we talking a significant amount ? Also the way I've set it up means that i'll be able to see whats actually ending up in there. In previous cars its been a route to vent moisture caused by condensation and usually contained very little oil. Has anyone else adopted a similar set up to my proposed and if so have you issues with the amount if oil expelled into the catch tank. Ive not experienced my car on the road or track yet so just trying to understand the peculiarities of an Ultima.

[V8Dom]

i once saw a car that only had a breather filter ontop... i think it was an autobionics car.

im not sure why we have a catch tank tbh but not prepared to remove until proven as my box was brand new and not secondhand.

dom

[Abbosevolution]

Thanks ever so Dom - My car is basically AB spec running an LS3. My thoughts were that any froth expelled via the breather would/could have a significant amount if moisture within, this hitting the cold catch tank would then condense and when the car stops the water/moisture would run straight back into the gearbox - this cant be good. Am I wrong or am I missing something ?

[V8Dom]

Storer said:

Hi Dom

I use the Factory one on my G50/52.

Why are you wishing to change? Christmas present money burning a hole in your pocket?




Paul

haha no

i want to clean up the engine bay.. breather tank going on bulk head higher up and this breather out of the way.. that way lots of room for the 180 degree headers or x over pipe exhaust i want to do ...hehehhehe

not sure why i have all these plans as ive been thinking of selling her as there is another ultima i want to buy...

[The Italian]

the gears are turning generating heat. This heat causes the air, inside your axle to expand. This expansion can cause an increase in pressure in the differential if it is not vented to atmosphere. If pressure increases and is not vented or cannot equalize with atmospheric pressure, it will pressurize the seals in the axle. If this occurs pressurized oil and air will move past your seals. The pressure could also force the seals to apply more pressure on the sealing surfaces. This would cause premature wear of the seals and the surfaces they mate to. I don't think the "RETURN" is needed, only the "open" & higher catch can. You want to allow pressure to escape and any moisture to evaporate out of the gearbox. I have seen the "on top" of can filter and I like it. If oil is escaping there is another issue like TOO MUCH OIL. A closed system will retain moisture and recycle any water back to the box in extreme heat.

[Abbosevolution]

Thanks Mike - my mock up does vent to the atmosphere as per the post so no pressure build up.

[The Italian]

Abbosevolution said:

Thanks Mike - my mock up does vent to the atmosphere as per the post so no pressure build up.

Yes and even though it is "CHEAP" it seems to be the correct type of tank. Most factory cars just have a vented plug. I like your set-up, if anything goes strange in the box, you can SEE IT ! Good call

[Storer]

The Italian said:

Abbosevolution said:

Thanks Mike - my mock up does vent to the atmosphere as per the post so no pressure build up.

Yes and even though it is "CHEAP" it seems to be the correct type of tank. Most factory cars just have a vented plug. I like your set-up, if anything goes strange in the box, you can SEE IT ! Good call

Don't worry about not being able to see an oil leak via the breather on your gearbox. I had an issue with an old catch tank and the oil 'vapour' went everywhere and was very obvious!!!!

Paul