Today's Message Index:
----------------------
1. 06:23 AM - Leaking vent line on QB tanks (Lenny Iszak)
2. 06:57 AM - Re: Leaking vent line on QB tanks (Tim Olson)
3. 07:22 AM - Re: Leaking vent line on QB tanks (Kelly McMullen)
4. 02:58 PM - Re: Leaking vent line on QB tanks (Lenny Iszak)
5. 03:07 PM - Re: Leaking vent line on QB tanks (Lenny Iszak)
Message 1
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| Subject: | Leaking vent line on QB tanks |
It appears that the blue nut on the vent line inside the tank was only hand tightened
by the QB builders. With more than 20 gallons in the tank, fuel started
dripping through the vent line. About a cup or more a day.
It's a real pain but it can be tightened through the fuel sender holes, while peeking
through the drain hole with a camera. I was lucky enough to be able to
borrow a friend's unfinished fuel tank so I can practice... Still without a camera
I couldn't do it.
The nut was lose on both tanks (only one was loose enough to leak though).
I heard this happen to others before. So if you have qb tanks it may be worth checking
before you install and proseal in the floats.
The vent line was also not bent right on one tank, so the float has no room to
go all the way to the top, but that's another story...
Lenny
--------
Lenny
#40803
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422237#422237
Message 2
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| Subject: | Re: Leaking vent line on QB tanks |
Did you have to use a funky custom wrench, or were you able to
use something more standard when using the camera method?
Tim
On 4/22/2014 8:22 AM, Lenny Iszak wrote:
>
> It appears that the blue nut on the vent line inside the tank was only hand tightened
by the QB builders. With more than 20 gallons in the tank, fuel started
dripping through the vent line. About a cup or more a day.
>
> It's a real pain but it can be tightened through the fuel sender holes, while
peeking through the drain hole with a camera. I was lucky enough to be able to
borrow a friend's unfinished fuel tank so I can practice... Still without a
camera I couldn't do it.
>
> The nut was lose on both tanks (only one was loose enough to leak though).
>
> I heard this happen to others before. So if you have qb tanks it may be worth
checking before you install and proseal in the floats.
>
> The vent line was also not bent right on one tank, so the float has no room to
go all the way to the top, but that's another story...
>
> Lenny
>
> --------
> Lenny
> #40803
>
>
Message 3
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| Subject: | Re: Leaking vent line on QB tanks |
If you proseal the sending unit to the tank, and that sending unit
fails, you will curse yourself for a long time while you try to remove
the proseal. Just saying, as I steel myself for having to do a proseal
repair on a Mooney tank.
On 4/22/2014 6:22 AM, Lenny Iszak wrote:
> -
>
> I heard this happen to others before. So if you have qb tanks it may be worth
checking before you install and proseal in the floats.
>
> The vent line was also not bent right on one tank, so the float has no room to
go all the way to the top, but that's another story...
>
> Lenny
>
> --------
> Lenny
> #40803
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=422237#422237
>
>
Message 4
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| Subject: | Re: Leaking vent line on QB tanks |
Ended up cutting a slot in a shorty box-end wrench so it goes on the vent tube,
and hooking up a bunch of long zip-ties on the other end, so i can maneuver it
around by holding onto the zip ties.
Lenny
Tim Olson wrote:
> Did you have to use a funky custom wrench, or were you able to
> use something more standard when using the camera method?
>
> Tim
>
> On 4/22/2014 8:22 AM, Lenny Iszak wrote:
>
> >
> >
> > It appears that the blue nut on the vent line inside the tank was only hand
tightened by the QB builders. With more than 20 gallons in the tank, fuel started
dripping through the vent line. About a cup or more a day.
> >
> > It's a real pain but it can be tightened through the fuel sender holes, while
peeking through the drain hole with a camera. I was lucky enough to be able
to borrow a friend's unfinished fuel tank so I can practice... Still without
a camera I couldn't do it.
> >
> > The nut was lose on both tanks (only one was loose enough to leak though).
> >
> > I heard this happen to others before. So if you have qb tanks it may be worth
checking before you install and proseal in the floats.
> >
> > The vent line was also not bent right on one tank, so the float has no room
to go all the way to the top, but that's another story...
> >
> > Lenny
> >
> > --------
> > Lenny
> > #40803
> >
> >
> >
> >
>
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422272#422272
Message 5
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| Subject: | Re: Leaking vent line on QB tanks |
A while ago I saw some plastic scrapers on AircraftSpruce, they look like double
edged razor blades. I bought some to try them out.
https://www.aircraftspruce.com/catalog/topages/scraperite12-03311.php
Cuts through the proseal like butter, but you have to use it as a knife not as
a scraper. It doesn't hurt the aluminum at all. On the face of the sender I just
used a razorblade to clean up around the screws.
Lenny
Kellym wrote:
> If you proseal the sending unit to the tank, and that sending unit
> fails, you will curse yourself for a long time while you try to remove
> the proseal. Just saying, as I steel myself for having to do a proseal
> repair on a Mooney tank.
>
> On 4/22/2014 6:22 AM, Lenny Iszak wrote:
>
> > -
> >
> > I heard this happen to others before. So if you have qb tanks it may be worth
checking before you install and proseal in the floats.
> >
> > The vent line was also not bent right on one tank, so the float has no room
to go all the way to the top, but that's another story...
> >
> > Lenny
> >
> > --------
> > Lenny
> > #40803
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=422237#422237
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422274#422274
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