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1. 05:17 PM - Re: Sealing Fuel Connectors and Loctite (FLYaDIVE)
2. 07:55 PM - Re: Sealing Fuel Connectors and Loctite (Doug Gray)
Message 1
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| Subject: | Re: Sealing Fuel Connectors and Loctite |
George,
Yes, start with the simple and easy first.
One huge area of leakage is the fuel quality sending unit. There are a few
different makes, but most use simple rubber or cork gaskets. The HUGE
issue with them is the installers OVER TIGHTEN THE MOUNTING SCREWS. Yes,
over tightening will distort the shape and the WILL LEAK! Replace them.
And tighten them to screw size torque specifications. My trick is also to
coat the gasket with a very light smear of PRC (or equivalent) sealant.
Don't Americanize it... More is NOT better.
Hoses, inspect the quality of the hose, no cracks, splits, or uneven cuts.
Make sure the ID of the hose fits the OD of the fitting. You should not
have to force. Use good quality hose clamps. NOT Home Depot garbage. A
good quality clamp is aircraft grade made by BREEZE CORP. SNUG UP THE
CLAMP! Again over tightening will cause problems.
As you tighten the rubber of the hose should just squeeze through the
openings in the strap. I use EZ TURN fuel lubricant to make sure the hose
slips on easy. If you can't get a seal easy then something is wrong and or
distorted.
Tank Sealant - I have done over three dozen tank sealing jobs. They
require diligent cleaning... New sealant WILL NOT stick to old sealant.
It requires a clean surface. Their are a few manufacturers of sealant, but
chemically they are all EXECTLY the same. The name is not important, what
is is the ASTM or MILL SPEC NUMBER. The first name that comes to mind is
PRC SEALANTS. Look up their website and review the types and specs. Then
find one that fits your budget. If you do not have any luck drop me a
line. READ ALL the types and specs.
I do not believe you have leaks between fittings and hoses. Unless as I
mentioned above there is something wrong. You DO NOT need, should not need
sealant on hoses.
Can you take pictures?
If you have questions throw them at me. Been their, Done that. Many
Times.
Barry
On Monday, October 12, 2015, George Nielsen <genie@swissmail.org> wrote:
>
> To my disappointment I noticed that fuel was leaking from my RV-6. On
> closer look and analysis I could tell that this came from the starboard
> fuel tank. That could be seen from paint being damaged. I removed the fuel
> tank and noticed that the leak came from the wing root. Then I tested and
> found no leak in the tank. Therefore it seems to me that the leak
> originates in the fitting of the fuel pipe with the fuel tank.
>
> What sealant can I use to ensure that no fuel leaks from the connection
> between the fuel tank and the pipes? There are two pipes, one for fuel to
> the cock and one for the fuel tank vent. Is there any possibility that fuel
> can leak from the fuel tank vent? I contacted Loctite and was told that
> none of their products was suited for sealing fuel. Is there any suitable
> product or should I just screw tighter?
>
> On another occasion when I was worried about fuel leaking from the
> fittings of the fuel tank with the cock an aircraft mechanic recommended
> that I use Loctite 603 and sold me some. I used it for the fittings with
> the fuel cock. I did not notice any leaking (nor had I noticed previously,
> as I used it for good measure). Now I wonder whether that was a good idea.
> Would it be easy to unscrew the pipes from the cock or is there a special
> procedure that I should follow.
>
> Thanks for your replies.
>
> George Nielsen
> RV-6 PH-XGN
> The Hague, the Netherlands
>
>
--
Sent from Gmail Mobile
Message 2
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| Subject: | Re: Sealing Fuel Connectors and Loctite |
Google 'weepnomore' - a service that will repair problems like this. The com
pany's founder Paul Beck has posted on various RV forums at various times.
Doug
Sent from my iPhone
> On 19 Oct 2015, at 11:17 AM, FLYaDIVE <flyadive@gmail.com> wrote:
>
> George,
>
> Yes, start with the simple and easy first.
> One huge area of leakage is the fuel quality sending unit. There are a fe
w different makes, but most use simple rubber or cork gaskets. The HUGE iss
ue with them is the installers OVER TIGHTEN THE MOUNTING SCREWS. Yes, over t
ightening will distort the shape and the WILL LEAK! Replace them. And tigh
ten them to screw size torque specifications. My trick is also to coat the g
asket with a very light smear of PRC (or equivalent) sealant. Don't America
nize it... More is NOT better.
>
> Hoses, inspect the quality of the hose, no cracks, splits, or uneven cuts.
Make sure the ID of the hose fits the OD of the fitting. You should not h
ave to force. Use good quality hose clamps. NOT Home Depot garbage. A goo
d quality clamp is aircraft grade made by BREEZE CORP. SNUG UP THE CLAMP! A
gain over tightening will cause problems.
> As you tighten the rubber of the hose should just squeeze through the open
ings in the strap. I use EZ TURN fuel lubricant to make sure the hose slips
on easy. If you can't get a seal easy then something is wrong and or disto
rted.
>
> Tank Sealant - I have done over three dozen tank sealing jobs. They requi
re diligent cleaning... New sealant WILL NOT stick to old sealant. It requ
ires a clean surface. Their are a few manufacturers of sealant, but chemica
lly they are all EXECTLY the same. The name is not important, what is is th
e ASTM or MILL SPEC NUMBER. The first name that comes to mind is PRC SEALAN
TS. Look up their website and review the types and specs. Then find one th
at fits your budget. If you do not have any luck drop me a line. READ ALL t
he types and specs.
>
> I do not believe you have leaks between fittings and hoses. Unless as I m
entioned above there is something wrong. You DO NOT need, should not need s
ealant on hoses.
>
> Can you take pictures?
>
> If you have questions throw them at me. Been their, Done that. Many Tim
es.
>
> Barry
>
>> On Monday, October 12, 2015, George Nielsen <genie@swissmail.org> wrote:
>>
>> To my disappointment I noticed that fuel was leaking from my RV-6. On clo
ser look and analysis I could tell that this came from the starboard fuel ta
nk. That could be seen from paint being damaged. I removed the fuel tank and
noticed that the leak came from the wing root. Then I tested and found no l
eak in the tank. Therefore it seems to me that the leak originates in the fi
tting of the fuel pipe with the fuel tank.
>>
>> What sealant can I use to ensure that no fuel leaks from the connection b
etween the fuel tank and the pipes? There are two pipes, one for fuel to the
cock and one for the fuel tank vent. Is there any possibility that fuel can
leak from the fuel tank vent? I contacted Loctite and was told that none of
their products was suited for sealing fuel. Is there any suitable product o
r should I just screw tighter?
>>
>> On another occasion when I was worried about fuel leaking from the fittin
gs of the fuel tank with the cock an aircraft mechanic recommended that I u
se Loctite 603 and sold me some. I used it for the fittings with the fuel co
ck. I did not notice any leaking (nor had I noticed previously, as I used it
for good measure). Now I wonder whether that was a good idea. Would it be e
asy to unscrew the pipes from the cock or is there a special procedure that I
should follow.
>>
>> Thanks for your replies.
>>
>> George Nielsen
>> RV-6 PH-XGN
>> The Hague, the Netherlands
>>
>> ==========
>> List" target="_blank">http://www.matronics.com/Navigator?RV6-List
>> ==========
>> FORUMS -
>> _blank">http://forums.matronics.com
>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> target="_blank">http://www.matronics.com/contribution
>> ==========
>
>
> --
> Sent from Gmail Mobile
>
>
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