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-   -   Fuel System Problem #1 - The case of the dripping tank vent (https://vansairforce.net/community/showthread.php?t=138397)

Saville 06-03-2016 10:45 AM

Quote:

Originally Posted by tturner (Post 1084262)
Saville

I did not need to use proseal. I just tightened up the loose one. The other side which I said was missing the ferrule also did not have a flare on the line. That was fun flaring a line inside of the tank. I did remove both of the tanks.

Ok thanks.

I'm hoping for just some loose connections. But whatever the problem is, it'll be fixed and done correctly.

Thanks!

edneff 06-04-2016 01:29 PM

Quote:

Originally Posted by Saville (Post 1084167)
Before it was fixed, did you notice anything odd about the fuel pressure reading?

nope. But that could be a shortfall in my observational skill...

edneff 06-04-2016 01:32 PM

Quote:

Originally Posted by tturner (Post 1084262)
Saville

I did not need to use proseal. I just tightened up the loose one. The other side which I said was missing the ferrule also did not have a flare on the line. That was fun flaring a line inside of the tank. I did remove both of the tanks.

I considered doing this to my vent line, re-flaring it... but my mechanic said replace the line, which was probably just as difficult. But he was the one doing the condition inspection.

Russ McCutcheon 06-04-2016 01:56 PM

use a funnel like this to drain the fuel into your can https://www.zoro.com/funnel-king-tra...Q&gclsrc=aw.ds

use this funnel to ad fuel to your airplane from a can http://www.ebay.com/itm/like/1509271...&ul_noapp=true

I think you can do the job without removing your tank, fingers crossed!

Saville 06-04-2016 02:43 PM

Quote:

Originally Posted by Russ McCutcheon (Post 1084729)
use a funnel like this to drain the fuel into your can https://www.zoro.com/funnel-king-tra...Q&gclsrc=aw.ds

use this funnel to ad fuel to your airplane from a can http://www.ebay.com/itm/like/1509271...&ul_noapp=true

I think you can do the job without removing your tank, fingers crossed!


Thanks for the URL's.

I got the Mr. Funnel and used that to drain the tank. I'll use it to fill the tank as you suggest.

I got the access plate screws out and half the ProSeal cut under the access plate before I quit.

It's tight but I'm getting it done.

And yeah fingers crossed that:

a) All it needs is tightening and

B) I can do it without removing the tank.

But if it turns out that I have to remove the tank, I will.

Thanks!

Saville 06-14-2016 07:13 AM

The B-nut was loose
 
Well I got the access plate off. The builder used the cork ring.

I reached in and........

...I could tighten the nut with my fingers. So that's why I heard bubbles in the tank, at that position, when I blew air in the air vent intake.

So now I have to figure out how many turns past finger tight to go...or nut facets.

Then, more problematical, I need to figure out how to install the 2 1/2" fuel line that goes between the fuselage and the access plate....WITHOUT messing up the flares. I have to make a new one as I messed up the flare at one end.

That one is a real head scratcher but there must be a way to work it in as I re-install the access plate/sender assembly.

bpattonsoa 06-14-2016 09:08 AM

First check that the fitting is made up right, good flare and a ferrule
Second, torque it up to the spec in Van's manual. I doubt if you could over torque it considering its location. Hold the fitting that is in the rib so it does not turn and cause a new leak.
Third, put the cover plate on with Proseal, cork will most likely leak.
Lastly, get some Allen head screws with washers to replace the Phillips head screws that are a major pain to remove or install in that tight place.

If you use the soft tubing Vans supplies, it can be bent by hand enough (after forming) to get it in place without damaging the flare. Put one end on and tighten by hand, bend slightly to give clearance to the other end, loosen the first end slightly and get the nut started on the second and then tighten.

Saville 06-19-2016 08:44 AM

Ok so Major progress on the repair:

The B-nut on the inside of the tank is tight
The new fuel line was made - two actually because the first was a little bit too long.
Access plate installed with ProSeal only (no cork gasket)
fuel line installed but the nuts are just lightly snugged up - letting the ProSeal cure first before I put the final snug on those.
Fuel sender installed and wired. Line from the fuel pump to the sender cleared with air prior to installing the sender - just in case my cleaning of the threads wasn't careful enough and some material got into the hose.

Ok so after the ProSeal cures and the fuel line buts are snugged up, the testing can begin.

At the point of the testing where I fuel up the tank, I'm going to do it in 1 gallon increments and make a measured dipstick since I don't have one. Also going to check the amount in the tank vs what the EFIS displays to see if I need to do a re-cal.

I recall someone in the forum saying they made their dipstick out of a paint stirring stick. Not a bad idea - I'll search the forum for ideas there.


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