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  #271  
Old 10-28-2014, 04:22 PM
N427EF N427EF is offline
 
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Posts: 1,516
Default Someone has

You just haven't paid attention.

See post #56
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  #272  
Old 10-29-2014, 01:12 AM
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rvmills rvmills is offline
 
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Location: Reno, NV
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Default

Still waiting for delivery of my manometer (31 days?slow boat, eh!). Will report case vacuum test results when I git 'em! Have the second (relief) valve installed as well.

Cheers,
Bob
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  #273  
Old 10-29-2014, 06:35 AM
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Bill.Peyton Bill.Peyton is offline
 
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Location: St. Louis, MO
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I'm with Vic. The backup relief valves just a crutch. It's not a matter of if it's going to clog up, it's when. So the backup valve is really the main breather. Mine was 90% clogged in less than 100 hrs. I will agree that it does reduce oil consumption by a slight amount, and it does keep the belly clean. But... The downside is far to great a price to pay as Gash demonstrated for us.
I have removed the exhaust tap, welded on a patch over the hole and vented the AO sep over the exhaust. Cleaning the belly every 25 hours is a good opportunity to inspect the plane.
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  #274  
Old 10-29-2014, 09:59 AM
rwhittier rwhittier is offline
 
Join Date: Oct 2006
Location: Glendale, AZ
Posts: 256
Default It is not just RV's

Quote:
Originally Posted by NTex View Post
I was just unaware of a required maintenance interval for this setup.
The Cirrus Turbo Normalized (TN) model does almost exactly the same thing. It ports the breather into the left tailpipe (without a valve) via a tube welded into the pipe. Owners love it because the belly is clean. But obviously if you dump any oil at all into that environment it will coke up and even gets looking like an icicle.

The AMM says to clean the coking out at every oil change. I have found some nearly closed that obviously were not maintained per the AMM. Many mechanics have a tool they use, some use a radiator hook, some just a long metal rod with a nail like arm welded out 90 degrees. Hook it and scrub around and the blockage is gone. In this case it is welded far enough aft in the tailpipe (and it is pretty large diameter pipe) that it is not much of a reach in. Just FYI, even production planes have this feature and issue.
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  #275  
Old 10-31-2014, 04:28 PM
douglassmt douglassmt is offline
 
Join Date: Nov 2008
Location: Missoula, MT
Posts: 714
Default Data

Just did my third oil change since installing the ASA air separator with the check valve plumbed into the right exhaust. I have installed the relief valve per Dan H.

At all three oil changes the tube welded into the exhaust was approximately 30% occluded with gummy black stuff. I removed and cleaned each time. Doesn't look like the relief valve has opened at all.

I run between 7 and 8 quarts, IO-540. Belly has been completely clean and the one small oil seep I had has completely dried up. Oil consumption doesn't seem to have changed although there really isn't enough data for a trend as yet.
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  #276  
Old 11-17-2014, 06:43 AM
orionis orionis is offline
 
Join Date: Nov 2014
Location: France
Posts: 8
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Hi all, just a quick question regarding ASA valve mount. I got mine without notice in the pack so checked on the web for valve set-up.

I found a page from Jason Beaver blog :
http://www.jasonbeaver.com/rv7/2013/...-aero-oil.html

stating : "The vacuum valve mounts on the exhaust pipe like this. The slight angle pressurizes the line so that only higher pressure from the crankcase will push gases into the exhaust pipe. This has a reed valve inside that only allows flow from the crankcase into the exhaust pipe and not the other way."




TBH, i was about to install it in the other direction

Thanks
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  #277  
Old 11-17-2014, 07:02 AM
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Bill.Peyton Bill.Peyton is offline
 
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It appears from the photo that the valve is being mounted improperly. The purpose of mounting it at an angle is so that you create a vacuum in the crankcase, not pressure!
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  #278  
Old 11-17-2014, 07:09 AM
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DanH DanH is offline
 
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Location: 08A
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Quote:
Originally Posted by orionis View Post
TBH, i was about to install it in the other direction confused
In the photo, the exit end of the tailpipe appears to be on the left. If so, you are mounting the tap backwards. Turn it 180 degrees.

In addition, note that taps mounted on the tailpipe appear to build internal deposits more quickly than taps mounted closer to the cylinder. Some RV-10 installations have clogged the tap tube in 30 hours or less. Please be sure that you install a second reed valve as a pressure release safety valve. See previous posts for photos, or contact Anti-Splat immediately.

Some of us hold the personal opinion that the particular silver-colored valve in the photo (brand/manufacturer unknown) is of poor quality. See previous posts in this thread documenting failures.
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  #279  
Old 11-17-2014, 07:15 AM
orionis orionis is offline
 
Join Date: Nov 2014
Location: France
Posts: 8
Default

This makes sense.

I hope to be the only guy that get the product without notice. Because this wrong information is the one you get first when you type "antisplat valve rv7"

Should be very useful that ASA put these notices in a download section..
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  #280  
Old 11-17-2014, 08:50 AM
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PerfTech PerfTech is offline
 
Join Date: Sep 2010
Location: Redlands, Ca.
Posts: 1,458
Default

Quote:
Originally Posted by orionis View Post
Hi all, just a quick question regarding ASA valve mount. I got mine without notice in the pack so checked on the web for valve set-up.

I found a page from Jason Beaver blog :
http://www.jasonbeaver.com/rv7/2013/...-aero-oil.html

stating : "The vacuum valve mounts on the exhaust pipe like this. The slight angle pressurizes the line so that only higher pressure from the crankcase will push gases into the exhaust pipe. This has a reed valve inside that only allows flow from the crankcase into the exhaust pipe and not the other way."




TBH, i was about to install it in the other direction

Thanks
... This is backwards, rotate 180 deg. Sorry your paperwork didn't get included with your order. I will e-mail you a copy today. Thanks, Allan...
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