Fuel tank leaks.

[Greg Ellis]

With all that old sealant removed and the new sealant done correctly with the proper thickness....you just might gain a couple of gallons of useful fuel!!! 

[Kelpro999]

8 hours ago, ArtVandelay said:

Great, except you’ll need to repaint the wings.

Yeah, it’s definitely not for saving paint

[rrodriguzzi1]

Polygone works. You have to have the right temp and a lot of patience. Works best with the original sealant. It doesn’t do well on the patches. I had to pull or scrape them off. Lots of patience. I did used aluminum tape around the access cut outs. That will protect against Polygone or any other stripper. I am painting that section on both wings later on. 

[carusoam]

+1 for finding and knowing…. Ribs at the top have vent holes…

Ribs at the bottom have drain holes….

Usable fuel depends on all of these holes be available to transfer air and fuel to the other side of the ribs…

Best regards,

-a-

[rrodriguzzi1]

Can you buy D-Zolve in smaller amounts or quantities? Like,  a gallon should do one side. 

[rrodriguzzi1]

That’s the website for D-Zolve.

[Kelpro999]

20 minutes ago, rrodriguzzi1 said:

Can you buy D-Zolve in smaller amounts or quantities? Like,  a gallon should do one side. 

They will give you a free pint for the asking but the smallest quantity for sale is 5 gallon pale.

[rrodriguzzi1]

Great! Whatever saves me time will be great! Got other projects going on. I will post the results / comparison with or against Poly-Gone. Which have work for me in the past. It just takes time. Thanks 

[rrodriguzzi1]

Actually, they responded right away to my email. 90 bucks per gallon. 

[Igor_U]

On 11/8/2022 at 6:57 PM, rrodriguzzi1 said:

Polygone works. You have to have the right temp and a lot of patience. Works best with the original sealant. It doesn’t do well on the patches. I had to pull or scrape them off. Lots of patience. I did used aluminum tape around the access cut outs. That will protect against Polygone or any other stripper. I am painting that section on both wings later on. 

Great job of documenting your tank work, thank you.

How much Sealant did you use for your job and which one? Did you use cartridge applicator or stuff in a can? 

[Igor_U]

Mooney service manual recommends PR1403-G-B2 for sealing removable access panels in the tank. I read it is discontinued in North America. 

What do you typically use as a replacement?

 

[N201MKTurbo]

16 minutes ago, Igor_U said:

Mooney service manual recommends PR1403-G-B2 for sealing removable access panels in the tank. I read it is discontinued in North America. 

What do you typically use as a replacement?

 

The manual lists three different sealants for access panels.

CS-3330-B

PR1403-G-B2

PR1428-B

You will find one of them.

[N201MKTurbo]

19 minutes ago, Igor_U said:

Mooney service manual recommends PR1403-G-B2 for sealing removable access panels in the tank. I read it is discontinued in North America. 

What do you typically use as a replacement?

 

I just Googled PR1403-G-B2 and got about 5 pages of places selling it.

[Igor_U]

1 minute ago, N201MKTurbo said:

The manual lists three different sealants for access panels.

CS-3330-B

PR1403-G-B2

PR1428-B

You will find one of them.

Well, not my 1967 SM. 

I do have somewhere newer manuals that this info is coming from but not on work computer. Thank you

[N201MKTurbo]

I have found the best place to get sealant is through Boeing. Find a repair shop with a parts department and have them order it for you. It is usually faster and cheaper than ordering on line.

[N201MKTurbo]

2 minutes ago, Igor_U said:

Well, not my 1967 SM. 

I do have somewhere newer manuals that this info is coming from but not on work computer. Thank you

That was from a J manual. Same wing, same tank, I doubt anyone would give you any grief for it.

[Igor_U]

Just now, N201MKTurbo said:

That was from a J manual. Same wing, same tank, I doubt anyone would give you any grief for it.

I understand, that was my next search when I get a hold of my personal computer.

2 minutes ago, N201MKTurbo said:

I have found the best place to get sealant is through Boeing. Find a repair shop with a parts department and have them order it for you. It is usually faster and cheaper than ordering on line.

By Boeing you mean Avial? 

I HATE when they call "heritage company McDonnel" and such and rebrand or claim they invented everything. They would call a DC-3 Boeing! 

Your Google people must be better than my google people. I got 5 pages, all right but no sale prices, only a few RFQ. Cheers

 

[N201MKTurbo]

1 minute ago, Igor_U said:

I understand, that was my next search when I get a hold of my personal computer.

By Boeing you mean Avial? 

I HATE when they call "heritage company McDonnel" and such and rebrand or claim they invented everything. They would call a DC-3 Boeing! 

Your Google people must be better than my google people. I got 5 pages, all right but no sale prices, only a few RFQ. Cheers

 

Yes, I liked Aviall better, but its Boeing now weather we like it or not.

[N201MKTurbo]

You can get it from Sky Geek, but they don't stock it, they order it from Boeing and then ship it to you after they get it, so it takes two shipping delays to get it.

[Fly Boomer]

1 hour ago, Igor_U said:

Mooney service manual recommends PR1403-G-B2 for sealing removable access panels in the tank. I read it is discontinued in North America. 

What do you typically use as a replacement?

 

ChemSeal CS-3204 https://www.aircraftspruce.com/catalog/pnpages/09-38500.php

ChemSeal CS-3330 https://pilotshq.com/products/chemseal-cs3330-low-adhesion-access-door-sealant-6-oz-cs3330b2kit

The first one goes inside the tank, and the second (low adhesion) is used on the access covers.

[Shadrach]

1 hour ago, Igor_U said:

Well, not my 1967 SM. 

I do have somewhere newer manuals that this info is coming from but not on work computer. Thank you

PR1403 was discontinued in North America a long time ago. Use CS3330 or equivalent.

 

 

[rrodriguzzi1]

I haven’t got to the materials part yet. Busy with other airplanes. I will post the information as soon as I get to it. Now, here are some pictures of what using the wrong hardware ( too long ) to your access panels. can do, creating more leaks in the process.  That’s also PolyGone at work on the access panels with original sealant. 

Edited November 23, 2022 by rrodriguzzi1
Word correction

[Shadrach]

@rrodriguzzi1 are you using polygon gel or polygon liquid? I found the liquid to be far more effective but challenging to lay down precisely for small repairs.

[Shadrach]

You’re braver than I. I’d be very afraid of anyone using a powered brush in my tank might round off rivet heads and render them unairworthy.

[rrodriguzzi1]

Yes. You just have to know when to stop. Talking about rivets, there’s about 8 to 10 rivets in this tank that were unairworthy right out of the factory. I will add pictures of that later.