ORD doubler vent line help

[bp71k5]

I have an ORD doubler with a 205 clocked up 2". My problem is that the 205 is losing gear oil fairly quickly. When I checked the 203, I found it is overfilled so I know that some of 205 lube is getting in there, but some of it is also spitting out of my vent hose on the adaptor and some is coming out the stock 205 vent cap.

I've been doing a bunch of freeway driving lately around 75 mph and I think that may be pushing the lube out quicker, but does anyone have any tips or tricks to keep this from happening? I'm thinking about trying to add a longer vent hose that will allow for more expansion before the lube has a chance to escape the end of the hose. Would that be at all useful?

Also, id like to replace the 205 vent cap with something that I can clamp a hose onto. Does that vent pop out like the vent on an axle?

 

[sixb]

Did you put the seal in the adaptor? My buddy said to put 2 in back to back to keep each case from swapping fluids on steep climbs but I only put the 1 in

 

[bp71k5]

Did you put the seal in the adaptor? My buddy said to put 2 in back to back to keep each case from swapping fluids on steep climbs but I only put the 1 in

Yep, I don't remember if there were one or two seals, but I remember pressing at least one in there. I think the 205 is filling the 203 and then the 203 is leaking because it's too full.

 

[sixb]

That sucks but you know what you gotta dotake em apart and see whats up with that seal, oh an give us/me an update when you know why

 

[bp71k5]

That sucks but you know what you gotta dotake em apart and see whats up with that seal, oh an give us/me an update when you know why

Haha, I'm going to try some other measures before I get that crazy. I'm just wondering if anyone else has had this issue.

 

[4X4HIGH]

Brian, you can pull (not sure how easily) the vent out of the 205 and tap it for 1/8" NPT and screw a hose barb fitting into it and then run a long hose up into the engine compartment. As for the adapter seal, the correct seal should have been a double lip seal to keep 203 oil from getting into the 205 and the 205 oil from getting into the 203. If you install a single lip seal then it will only seal fluid transfer in one direction (the side with the spring won't pass oil). I'm afraid since you KNOW you have a problem there you'll be pulling the 205 off to check/replace this seal. If you need any advice/assitance just give me a call.

 

[bp71k5]

Brian, you can pull (not sure how easily) the vent out of the 205 and tap it for 1/8" NPT and screw a hose barb fitting into it and then run a long hose up into the engine compartment. As for the adapter seal, the correct seal should have been a double lip seal to keep 203 oil from getting into the 205 and the 205 oil from getting into the 203. If you install a single lip seal then it will only seal fluid transfer in one direction (the side with the spring won't pass oil). I'm afraid since you KNOW you have a problem there you'll be pulling the 205 off to check/replace this seal. If you need any advice/assitance just give me a call.

I suppose if no other measures work, the seal may need to be replaced. I used the seal that came with the kit, but don't know what kind it was. I can see some oil coming out the 205 vent as well so something other than the seal is also a problem.

 

[sixb]

I went ahead and installed a second seal on mine this morning just to be safe but I fail to see why a seal wont work in both directions anyway, if the spring is pushing against the rubber hard enough to keep oil out in one direction why not both

 

[bp71k5]

I did find some mud stuck up near the vent cap on the 205 so tht may have caused some pressure buildup, but it seems clear now, but id still like to out a hose up there instead. My problem with dropping the cases is that I lose a gallon of very expensive fluid in the transmission. Ugh.

 

[4X4HIGH]

I went ahead and installed a second seal on mine this morning just to be safe but I fail to see why a seal wont work in both directions anyway, if the spring is pushing against the rubber hard enough to keep oil out in one direction why not both

Because of how a seal is designed it will only seal in one direction UNLESS it is a double lip seal. I don't know how to explain it while typing but i could show you in person why it will only seal in one direction.

 

[76zimmer]

just for reference, this is the vent line from my ~85 model 205. It is a threaded pipe.....

 

[bp71k5]

Scott, do you know what size the hole the vent happens to be?

I'm wondering if I need to drill it out before tapping it.

 

[76zimmer]

1/8" npt

 

[bp71k5]

1/8" npt

Perfect, thanks!

 

[bp71k5]

The more I look at this the more I think pulling the 205 rear output or the entire 205 portion out might be easier. If I did leave the rangebox attached to the trans, and removed the 205 from the doubler adaptor, is the seal accessible from the exposed side of the adaptor?

 

[sixb]

The more I look at this the more I think pulling the 205 rear output or the entire 205 portion out might be easier. If I did leave the rangebox attached to the trans, and removed the 205 from the doubler adaptor, is the seal accessible from the exposed side of the adaptor?

Yes!

 

[4X4HIGH]

Scott, do you know what size the hole the vent happens to be?

I'm wondering if I need to drill it out before tapping it.

Brian, you can pull (not sure how easily) the vent out of the 205 and tap it for 1/8" NPT and screw a hose barb fitting into it and then run a long hose up into the engine compartment. As for the adapter seal, the correct seal should have been a double lip seal to keep 203 oil from getting into the 205 and the 205 oil from getting into the 203. If you install a single lip seal then it will only seal fluid transfer in one direction (the side with the spring won't pass oil). I'm afraid since you KNOW you have a problem there you'll be pulling the 205 off to check/replace this seal. If you need any advice/assitance just give me a call.

If you SLOOOOW down and read my post i said /\ "tap it for 1/8" NPT".

 

[76zimmer]

mine was a tapped hole already, but its a round pattern also.

 

[bp71k5]

Bringing this back up. I removed the housing and tapped the vent for 1/8" npt. After installing a barbed fitting, I connected the 205 vent and the 203 vent with a TEE and then ran a long vent hose from there into the engine bay. It ha been fine for a month or so with no leaks.


Ive been noticing some oil under there the past week and took a look. I found an actively dripping leak from the rear output housing gaskets today. After investigating more, the 203 is overfull again and the 205 is low. The 205 vent hose is also super oily. I'm positive now that the 205 is pushing a lot of oil out the vent hole.

With a 2000mile trip coming up next week, id like to figure out what's going on. My only plan at the moment is to remove the TEE and run a separate line for both cases. That way any oil getting in the hose will have a chance to drain back into it's own case if it does get pushed out.

Any theories on why the 205 is pushing out so much oil?

 

[jms]

So... on the FJ40, it's a known issue that the transmission likes to steal fluid from the transfer case. The solution is a tube from the fill plug of the transmission back to the fill plug of the t'case so the oil can go back. They even make a kit for that.
A similar setup might be something to consider in your case...as a fix...