Venting a Moser

[eville]

What are you guys using to vent your Moser? Their instructions say to use a tube over to the frame rail which seems kinda cheesy to me.

Thoughts, suggestions and pictures appreaciated.

[HarleyR]

-6AN with a K&N Style breather is nice.. Just mak sure it wont kink during suspension travel...

[parsonsj]

6AN to vapor/liquid separator in trunk, then vented via K&N breather underneath car.

jp

[eville]

6AN to vapor/liquid separator in trunk, then vented via K&N breather underneath car.

jp

Like this? Seems like overkill to me, and I typically like overkill....


http://store.summitracing.com/partdetail.asp?autofilter=1&part=MOR%2D85471&N=700+%2D205247+115&autoview=sku

[eville]

Hmm, thoughts on these?
http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2DE730301&N=700+4294848937+115&autoview=sku

[HarleyR]

Those work well providing the rear end isnt over filled which seems to be a common problem with people...

[parsonsj]

Check out a picture of it here (https://www.pro-touring.com/forum/showpost.php?p=191476&postcount=6) (ignore that this shows a fuel tank connection... the rear end housing is identical).

jp

[jy211]

Pardon my ignorance, but what is the venting for? Do all Moser rears have to have this?

[parsonsj]

I've read that 9" housings need venting to reduce stress on the axle and 3rd member seals/gaskets. I'm not sure that 12 bolts or Danas need it as much. But if you think about it, as the air and liquid inside the housing warms up, it will expand. Having a vent seems like a good idea, and using filtered air for this would be a good idea too.

jp

[eville]

I decided to run one of these for now. I might do something different when I finally get to an EFI setup with an electric pump and need a tank vent too...
http://store.summitracing.com/partdetail.asp?autofilter=1&part=KNN%2D62%2D1090&N=700+0&autoview=sku

[69HuggrrrPT]

I decided to run one of these for now. I might do something different when I finally get to an EFI setup with an electric pump and need a tank vent too...
http://store.summitracing.com/partdetail.asp?autofilter=1&part=KNN%2D62%2D1090&N=700+0&autoview=sku

I'm looking for something better as well.
How would this push into the threaded hole on the housing?

[parsonsj]

The threaded hole is pipe thread (or mine was, anyway). Put a pipe to nipple adapter in the housing, then a short piece of hose to the breather.

jp

[eville]

I'll run a 1/4" npt to -6 nipple at the rear to a piece of pusholock hose and -6 fitting, make a bracket to mount the breather somewhere. I'll post up a picture on Sunday.

[1969CamaroRS]

What about just using a rubber hose to vent but putting a cheapie fuel filter in line and hanging it up where it can bend down. Then the water has to go directly up, get through the filter and then make a turn down.

[parsonsj]

Then the water has to go directly up, get through the filter and then make a turn down.
Water? Why are you talking about water?

jp

[1969CamaroRS]

Isn't the idea to keep water from getting into the vent and eventually the axle?

[parsonsj]

Well, sure. We don't want water anywhere where there is lubrication going on.

But that's not the reason for the filter on the breather. The idea is to filter air to keep dirt out. Dirt allowed in as part of the venting process can shorten the life of the parts.

Keeping water out is important, so a breather design shouldn't "collect" water. My breathers are shielded and hang upside down so that any water ingested can't make it into the axle innards. Direct-attached circle track style breathers are probably not good, since those cars don't have to worry about driving in the rain.

jp

[Vegas69]

Hmm, thoughts on these?
http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2DE730301&N=700+4294848937+115&autoview=sku

I am going to run something similar. On my moser 12 bolt the vent is halfway between the carrier and axle flange. Can't think I am going to have to worry about much puking in that area. Time will tell.

[jy211]

my moser didn't come with the screw-in/breather tube part (the part into the rear end). Where can I find this?

[ProdigyCustoms]

It is just a 1/4 pipe to barb fitting Jeff

[Bow Tie 67]

I have been pumping fluid out the breather at track events. At first I just put a 4" hose on the nipple and it was fine until I really pushed it on the track. I pushed fluid out onto the exhaust, man that stunk, ask SubtleZ28 ( Shaun ) he was right behind me. So then I put on the sintered bronze vent and same thing although not as much.

My question is for a quick fix, until I have more time over the winter, whats the best type of filter to use so I don't loose fluid? or is it more of a matter of placing it high enough? I also thought of plugging it and moving it closer to the center section so I don't have the g's pushing it all to the vented side during long hard sweeping turns.

Thanks,
Matt

[Thumpin'66]

I just used low budget rubber fuel hose to a clear plastic fuel filter fastened to the body above the rear axle area.

[Vegas69]

I had to end up switching over to a 1/4 nipple and a hose up to a K+N. So far so good.

[ls1 nova]

Here is a pic of mine. Am I doing something wrong. If you are not four wheeling your pro tour car why do you need to vent much higher than this?

https://static1.pt-content.com/images/noimg.gif

[Vegas69]

That will leak like a siv. Already tried a similar setup.

[parsonsj]

Here is a pic of mine. Am I doing something wrong. If you are not four wheeling your pro tour car why do you need to vent much higher than this?It will "vent" fine. But you'll have gear fluid everywhere.

jp

[ls1 nova]

Leak oil out or water in?

[Vegas69]

Read the previous post from John.

[Bow Tie 67]

Mine is fine until I pull high G's cornering. It's amazing how much fluid pumps out and the mess it makes. I'll be making a permanent solution over the winter, most likely with AN hardware.

[hotrdblder]

i have had no trouble with mine, however i am with matt, i will be using a pipe thread to an#4 and run line up to frame rail and mount a small k/n style filter

[parsonsj]

i will be using a pipe thread to an#4 and run line up to frame rail and mount a small k/n style filterThat's very similar to what I'm doing. I use 6 AN, but that's probably excessive.

jp

[Bow Tie 67]

probably excessive.

jp


John,

Say it an't so, not on your car!!! LOL

Matt

[GetMore]

A larger hose might help if you have problems with fluid being pushed up the hose. To small and there's no room for the air to get past the oil. A -12 line will work, but will be way overkill.

[parsonsj]

Say it an't so, not on your car!!!:) You seem to be implying I've gone overboard in other areas on the car, lol!

jp

[Steve Chryssos]

On Power Tour, improper venting + overfilling led to a blown axle seal. At RTH2, my LR brake assembly was covered with gear oil--pad and all because ran a vent hose to the frame rail as per Moser's recommendation, but..I aimed the vent hose right at the brake assm. I just never thought it would puke. Oops! Brain on: Now I have a barb with a 6" piece of hose that goes up to a 180 degree bend then straight back down aimed at the floor. A Zip tie controls it's 180 degree shape. Rear is filled with the car completely level to avoid overfilling.

[Vegas69]

A larger hose might help if you have problems with fluid being pushed up the hose. To small and there's no room for the air to get past the oil. A -12 line will work, but will be way overkill.

1/4 npt to 12an is probably impossible without 12 adapters. 3/8 hose and the filter above and as far away from the rear end as possible.

[Bow Tie 67]

On Power Tour, improper venting + overfilling led to a blown axle seal. At RTH2, my LR brake assembly was covered with gear oil--pad and all because ran a vent hose to the frame rail as per Moser's recommendation, but..I aimed the vent hose right at the brake assm. I just never thought it would puke. Oops! Brain on: Now I have a barb with a 6" piece of hose that goes up to a 180 degree bend then straight back down aimed at the floor. A Zip tie controls it's 180 degree shape. Rear is filled with the car completely level to avoid overfilling.

Steve,

That will most likely puke also:

I added a piece of tubing about 4" with a fuel filter as a temp fix. The pics show first installed and some oil in the filter with a fine layer of oil on everything after racing it. I don't believe enough pressure was present to make a mess at the auto-x. But add high sustained g's, 4.10's and high rpm and it made it past the filter enough to spray the undercarriage and drip from various compnents.

Now I'm wondering if -6 will be better for drain back or worse for oil pressure release? I want to run a AN hardline to the center of the diff then a flexable hose to a K & N mounted to the DSE shock tunnel.

Matt

https://static1.pt-content.com/images/noimg.gif (http://good-times.webshots.com/photo/2019221130065608932iQYaLt)

https://static1.pt-content.com/images/noimg.gif (http://good-times.webshots.com/photo/2730431370065608932uqcMco)

[parsonsj]

I run 1/4" NPT to 6 AN. From there to a low-profile 6 AN 90 fitting (to keep the line out of the exhaust at full suspension compression) to 18" of flex hose to a bulkhead fitting into the trunk. From there I go hardline to another bulkhead fitting on the outside of the frame rail behind the rear tire in a little protected area. I hang a K&N crankcase filter from there.

jp

[Steve Chryssos]

No puking at Pocono, Road Atlanta, RTH3 or RTH4 and no blown axle seals either.

[hotrdblder]

you guys need to install these, and be done with all this leaky stinky gear oil mess's, bottom right page 18
http://www.lefthanderchassis.com/CH18.html

[chicane67]

-6, -8, or -10 is in the norm. I normally plumb for -10. I do however, believe that -12 would be unnecessary... unless its being used with some pump/cooling systems... but not with builds that you would find here.

The "Seals It" tube seals work great to create a 'dry' tube... and if you were to use a method such as this you would have to move the vent to the center section of the housing, or it will not breathe.

The addition of a smaller K&N filter (or like) would also be a good move.

[Vegas69]

Had mine in the air tonight and it's still pissing a little. Going to have to figure out something else one of these days. Probably about a foot of hose and K+N attached to the front G BAR brace.

[Motobrewmaster]

Hey John and whoever else, What did you do for venting the rearend? I bought the II Much 100034 and will do the install as suggested, nice piece by the way!

However I have a Moser floater 12 bolt that they unfortunately put the vent hole directly where my upper brackets are going for the Ridetech 4-link. My question is where do you think the best place to put the new vent would be? I have a picture of the rearend attached

[parsonsj]

Wow... a nine year old thread. That's gotta be a record.

Anyway, I'd move inboard of the bracket, just to make the packaging easier.

[Motobrewmaster]

Yeah, had to blow some dust off of this one. The search pulled it up and it seemed appropriate.

Thanks John, that was the direction I was leaning to. I just didn't want to put it where there might be some spray or splashing coming from the gears.

[raustinss]

moderator please remove all of this persons posts......spam ..ban thomaskign

[chpr1972]

I read the whole thread. But the one thing asked was are all rear end housing vented. The answer is yes. For most GM housing they used a small vent that had what I figure was designed as a pop off cap. It let the heat out of the rear end when driving down the road. Usually you will find it in the passenger side of the car and about 1/2 to 3/4 in tall. Normal street usage that is all you need. racing is a totally different animal.

[Skip Fix]

I've had a couple of GM trucks that had a section of hose going from the rear to a bracket on the frame with the vent up there.

[Motobrewmaster]

146891146892146893
Here is how I have mine.