182 breather tube exit?
Wed Dec 30, 2015 9:39 pm
182 breather tube exit?
My crankcase breather tube makes an abrupt 90 turn before exiting the bottom cowl and points on the nose gear strut... Is this normal?
Wed Dec 30, 2015 9:45 pm
Re: 182 breather tube exit?
Not sure about the breather tube, but I'd highly recommend dumping the glass strainer and getting one of Steves aircraft aluminum gascolators...
Wed Dec 30, 2015 11:25 pm
182 breather tube exit?
Hoeschen wrote:My crankcase breather tube makes an abrupt 90 turn before exiting the bottom cowl and points on the nose gear strut... Is this normal?
No, not normal... Looks to me like the whole tube could be installed up side down, would need to see it in its entirety to know for sure though... Normal breather tube exit is just straight down and cut off an inch or so below the lower part of the firewall..
Brian...
- Brian-StevesAircraft offline
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Thu Dec 31, 2015 12:23 am
Re: 182 breather tube exit?
I like to run hose all the way down. That aluminum tube seams to chafe on and into everything.
Looks like the top airbox skin could use some rivets on the flange. That's a $900 skin these days!!!
Looks like the top airbox skin could use some rivets on the flange. That's a $900 skin these days!!!
Thu Dec 31, 2015 3:42 am
Re: 182 breather tube exit?
Hoeschen wrote:My crankcase breather tube makes an abrupt 90 turn before exiting the bottom cowl and points on the nose gear strut... Is this normal?
I would be thinking so. This is one way of limiting ice blockage. Another way it to drill a hole somewhere before the exit from the cowl on a straight down pipe. All I can say is, if it ain't broke, don't fix it. And, it works, it ain't broke!
I should elaborate a bit .... Fly long enough in cloud and the breather tip will ice up. When it does, you will land with inexplicable oil leaks that will not be repeated until the next encounter with ice. You can drill a hole, or bend the tube to where warmer air is, or stay VFR, out of cloud.
- aussie bob offline
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Thu Dec 31, 2015 3:50 am
Re: 182 breather tube exit?
aussie bob wrote:Hoeschen wrote:My crankcase breather tube makes an abrupt 90 turn before exiting the bottom cowl and points on the nose gear strut... Is this normal?
I would be thinking so. This is one way of limiting ice blockage. Another way it to drill a hole somewhere before the exit from the cowl on a straight down pipe. All I can say is, if it ain't broke, don't fix it. And, it works, it ain't broke!
I should elaborate a bit .... Fly long enough in cloud and the breather tip will ice up one day. When it does, you will land with inexplicable oil leaks that will not be repeated until the next encounter with ice. You can drill a hole, or bend the tube to where warmer air is, or stay VFR, out of cloud.
- aussie bob offline
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Thu Dec 31, 2015 6:03 am
Re: 182 breather tube exit?
A1Skinner wrote:Not sure about the breather tube, but I'd highly recommend dumping the glass strainer and getting one of Steves aircraft aluminum gascolators...
I have one; it didn't fit. Need to call Brian I suppose. I thought these were direct replacements but the bottom of the Steves
gascolator interfered with the nose gear brace.
Thu Dec 31, 2015 6:08 am
Re: 182 breather tube exit?
Brian-StevesAircraft wrote:Hoeschen wrote:My crankcase breather tube makes an abrupt 90 turn before exiting the bottom cowl and points on the nose gear strut... Is this normal?
No, not normal... Looks to me like the whole tube could be installed up side down, would need to see it in its entirety to know for sure though... Normal breather tube exit is just straight down and cut off an inch or so below the lower part of the firewall..
Brian...
On my RV this tube ran straight down the firewall. This tube is more aligned with the back of the engine / nose gear strut. I agree that it should be straight bug whereabouts should it be? Any pics anyone? It does have a whistle vent hole a few inches above the bend.
Thu Dec 31, 2015 12:33 pm
Re: 182 breather tube exit?
I'm thinking perhaps that it got rotated 90 degrees at some point in its life and maybe I should just loosen the hose clamp and turn it to point aft....
Thu Dec 31, 2015 1:11 pm
Re: 182 breather tube exit?
It looks to me that the whistle slot is right at the bend in the tube. If that's the case, it needs to be higher up in the cowling. that's almost sticking out in the breeze. I sure wouldn't just rotate it, I'd remove it, and replace or modify it to exit straight down. That long length of tube that low in the cowl is an invitation to freeze up. I like them cut off just about flush with the bottom of the firewall, and with a whistle slot well up in the cowling.
MTV
MTV
Thu Dec 31, 2015 1:15 pm
Re: 182 breather tube exit?
It looks like that whistle slot could create a venturi. Hard to believe that would be beneficial to the engine.
Thu Dec 31, 2015 2:17 pm
182 breather tube exit?
The whistle slot is on the same side that the tube bends towards and it is about three inches above the bend. Can't see the slot in in the photo. The bend is right at the bottom of the firewall in elevation
Seems I could just nip it off right above the bend.
Seems I could just nip it off right above the bend.
Thu Dec 31, 2015 10:27 pm
Re: 182 breather tube exit?
What is shown in the illustrated parts catalogue?
I also suspect that the pipe has been installed upside down. I agree that it could cause a vacuum in the crankcase. They nearly always exit straight down, regardless of make, model, or year.
That pipe sees a lot of wear over time. My 4000 hr. T210 has that pipe spliced a couple times with hose where it rubbed through on the starter drive, accessory case, and anything else it touched on the way to exiting the cowl. Fortunately, there was enough evidence to piece it all back together.
This justifies more research before you trim off any of the factory pipe.
I also suspect that the pipe has been installed upside down. I agree that it could cause a vacuum in the crankcase. They nearly always exit straight down, regardless of make, model, or year.
That pipe sees a lot of wear over time. My 4000 hr. T210 has that pipe spliced a couple times with hose where it rubbed through on the starter drive, accessory case, and anything else it touched on the way to exiting the cowl. Fortunately, there was enough evidence to piece it all back together.
This justifies more research before you trim off any of the factory pipe.
Fri Jan 01, 2016 10:10 am
Re: 182 breather tube exit?
I don't think it's upside down because for the other end is swedged where it inserts the rubber hose and secured by hose clamp.
I'm not seeing how it would put a vacuum on any more than one pointing straight down. Maybe pressurize the case if it's at all pointed into the exit air, which would be a bad thing. A little vacuum would be a good thing. Unless it's pullin oil out
I'm not seeing how it would put a vacuum on any more than one pointing straight down. Maybe pressurize the case if it's at all pointed into the exit air, which would be a bad thing. A little vacuum would be a good thing. Unless it's pullin oil out
Fri Jan 01, 2016 11:00 am
Re: 182 breather tube exit?
I think also that it might be upside down. If you cut the breather hose off just aft of the baffling, reversed the tube, and stuck the longish 90 degree bend into the hose-- that looks like it'd just about locate the riser part of the breather tube against the firewall.....which is where I generally see them.
Cessna Skywagon -- accept no substitute!
Fri Jan 01, 2016 2:15 pm
Re: 182 breather tube exit?
A1Skinner wrote:Not sure about the breather tube, but I'd highly recommend dumping the glass strainer and getting one of Steves aircraft aluminum gascolators...
What's the issue with the old clear strainer anyway?
Fri Jan 01, 2016 2:19 pm
Re: 182 breather tube exit?
Hoeschen wrote:A1Skinner wrote:Not sure about the breather tube, but I'd highly recommend dumping the glass strainer and getting one of Steves aircraft aluminum gascolators...
What's the issue with the old clear strainer anyway?
I've always heard the biggest reason to change it is on a wreck the glass will break and you'll have fuel spraying onto hot exhaust. I'm sure some more experienced minds can clear it up for sure.
Mon Jan 04, 2016 8:43 am
Re: 182 breather tube exit?
I agree with MTV's advice. Get that hole way up on the tube. You definitely DON"T want it pointing ahead....a very reputable outfit installed one of our engines once and was griping about it smoking...when I got there to check it out, the vent tube was pointed straight ahead into the wind....they still argue about that not being right. 
I've seen them pointing back, and as long as that whistle hole is big enough, that wont hurt anything, but cutting it off flush or maybe a slant cut with the slant facing rearward is what I've seen work the best.
JH
I've seen them pointing back, and as long as that whistle hole is big enough, that wont hurt anything, but cutting it off flush or maybe a slant cut with the slant facing rearward is what I've seen work the best.JH
- hardtailjohn offline
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God put me here to accomplish a certain amount of things...right now I'm so far behind, I'll never die!!
Mon Jan 04, 2016 10:15 pm
Re: 182 breather tube exit?
My 1956 182 has a 0470-L. My tube is shaped like yours except it faces rearward. I'll be home in a week and can send you pics of it. It works just fine.
- SkylaneSam offline
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Tue Jan 05, 2016 1:08 pm
Re: 182 breather tube exit?
SkylaneSam wrote:My 1956 182 has a 0470-L. My tube is shaped like yours except it faces rearward. I'll be home in a week and can send you pics of it. It works just fine.
Thank you, I figured it had been inadvertently rotated...
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