Does your plane have a SNIFFLE valve ?

[DrBill]

In tracing an intake leak we found a couple that were large (standby vac tap was the worst) but on final check we traced a leak to the SNIFFLE valve.   In it's place is a right angle brass elbow with a 5 in piece of Aluminum tube to a rubber hose to the fitting on the bottom of the cowl..  No orifice or restriction.  About a 1/8 in hole all the way.  I've read in some other forums that many Mooneys are like this and the mixture is adjusted to compensate.  We're going to put it all  back the way it was and if we can get good idle adjustment we'll let it go but just for grins.... WHAT DO YOU HAVE ?

Bill

 

 

[Mooneymite]

[KSMooniac]

Everyone should have a working sniffle valve.

[MB65E]

I have one installed but it dosent have the right angle on it. I'd like to grab one that a fitting with a line can attach too and drain properly to the cowl exit. Lycon manufactures their own with a 1/8 in pipe thread/3/8 male an fitting with the check ball I believe.

There is also an early SB from mooney that lists the parts.

-Matt

[Guest]

Bill,

The sniffle valve/ drain fitting on your engine should be an aluminum elbow with a 1/8 NPT pipe thread on one end and an flaired -4 thread on the other. Mooney modified the flaired end and installed a small nylon ball which is retained by a small roll pin in the threads.

When the engine is running, intake vacuum suck the ball up closing the hole, when not running gravity pulls the ball down allowing fuel to drain through the over board line.

Clarence

[N201MKTurbo]

What Clarence said.

Maybe someone didn't know what it was and changed out the elbow. Just unscrew the AN fitting and look in to see if you can see the ball. If not then make or buy a new one.

[carusoam]

For proper sniffle valve operation...

http://mooneyspace.com/topic/12850-need-help-diagnosing-intermittent-drip/?hl=sniffle#entry163660

I think José explained it for me... Ball valve that closes when the engine runs (vac), opens when the engine stops.

For more... Put the word 'sniffle' in the search box, click the forums button. There are a few threads that may make sense...

I have heard it described the part is made by simple machining of ordinary plumbing. It is possible to confuse and replace with the incorrect part. Like M20Doc described...

The part that MooneyMite is showing looks better than the description that I had heard...

Best regards,

-a-

[DrBill]

Looks like I'l make mine work.. Any ideas where I can find a nylon ball about 3/16 dia ?

BILL

[N201MKTurbo]

http://www.mcmaster.com/#9613k15/=to5ks8

[DrBill]

http://www.mcmaster.com/#9613k15/=to5ks8

Super.. That's the first place I would go to!  Have to get a clear plastic tube from them for a bird feeder.

THANKS!

BILL

[DrBill]

Took plane for post annual flight today and I now have to learn how to land it again since the idle is now under 600 (was 900). All things are working and good.  Will do some more practice next week.

 

BILL

[Alan Fox]

Give it some Afrin......

[DrBill]

YEP.. Sudafed is not hacking it !

BILL

[bdjohn4]

I'll never forget the day I discovered "McMaster-Carr".  I can hear angels singing "Hallllllelujah!" every time I go on their website.

John

[carusoam]

Engineer's paradise for all mechanical things...

-a-

[N601RX]

If you think their website is good, you should go inside the facility. Their order processing and handling is amazing. The Atlanta distribution center is huge. Last time I was there picking up something I think I remember something like 25 or so UPS semi's backed up to their loading docks.