Aluminum diesel tank - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 12 Old 01-18-2008 Thread Starter
Junior Member
 
Join Date: Jan 2008
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Aluminum diesel tank

Hi all. I am rebuilding a Morgan O/I 41. 1978 - that's been sitting for about 5 years - except for the trip from the keys to Virginia. ( and on that trip we used a day tank )
So I decided to pump out the fuel tank - about 80 gal. of fuel - and the stuff that came out was really foul. So I decided to cut a manhole and check it out. U cant belive how it looked - about 1/2 to 3/4" thick sludge stuck to the only slanted surface( about 14" at 60 degree angle the whole lenght of the tank - about 6' ) and on the bottom !!?? Nothing on the vertical areas ??
The bottom (about 6" wide ) was also covered with sludge above the suction pipe - about 1 1/2". I cleaned the tank and scraped of some hard stuff - I guess corrosion stuff -and the slanted surface and the bottom is pitted - nothing else ??!! Not the baffles or the side walls.
I poked the pits and found out that they appear to be from the inside ( they bottom out in about a 3rd of the thicknes on the slanted surface and about 1/2 on the bottom. Any ideas of why this is and how to treat the tank to be able to keep it. Is there a paint or epoxy to seal the pits with??
Cheers
ekotopia is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 12 Old 01-18-2008
Senior Member
 
Join Date: Jun 2006
Posts: 2,394
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 12
     
uhhh, get a new tank. period.

We are not primarily on earth to see through one another, but to see one another through

Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs
cardiacpaul is offline  
Quote Quick Reply Share with Facebook
post #3 of 12 Old 01-18-2008
Senior Member
 
sailboy21's Avatar
 
Join Date: Apr 2006
Location: SE Alaska
Posts: 722
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
what he said..

But if you want to be cheap about it marine-tex sticks like something nasty to wire brushed solvent free aluminum . But.. to be fair let the next owner know what you did

Last edited by sailboy21; 01-18-2008 at 06:04 PM.
sailboy21 is offline  
Quote Quick Reply Share with Facebook
post #4 of 12 Old 01-18-2008
On the hard
 
CharlieCobra's Avatar
 
Join Date: May 2006
Location: Bellingham, WA.
Posts: 3,503
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 11
   
Glad my tank is Monel.
CharlieCobra is offline  
Quote Quick Reply Share with Facebook
post #5 of 12 Old 01-18-2008
Senior Member
 
Join Date: Sep 2006
Location: Scotland
Posts: 2,364
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 9
 
Two part polysulphide sealant will do it. It sticks like, well, glue, and does not let go.
Rockter is offline  
Quote Quick Reply Share with Facebook
post #6 of 12 Old 01-18-2008
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
Rockter-

I don't think polysulfide sealant is a good idea in a diesel tank. Epoxy is far more fuel resistant IMHO.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #7 of 12 Old 01-18-2008
Senior Member
 
artbyjody's Avatar
 
Join Date: Jan 2008
Location: Bellingham, PNW
Posts: 3,146
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 11
       
If you haven't seen this [Click Link: article before]: Probably a decent guide if you are going to do it yourself.... Although - I would consider just removing the tank and take it a machine shop in town and have them cut out the base of the tank and weld in a new one...

-- Jody

S/V "
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
" -
1983, Barberis Show 38! or
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.







artbyjody is offline  
Quote Quick Reply Share with Facebook
post #8 of 12 Old 01-19-2008 Thread Starter
Junior Member
 
Join Date: Jan 2008
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Thanx for responds - but does any have a clue to why the sludge and pitting was only on the slanted surface . The bottom I can understand, but why not on verticals?
As of removing the tank -
only in pieces - its 120 Gal. under the side deck next to a center cockpit.
Love to hear more....
Cheers
ekotopia is offline  
Quote Quick Reply Share with Facebook
post #9 of 12 Old 01-19-2008
Senior Member
 
Join Date: Sep 2006
Location: Scotland
Posts: 2,364
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 9
 
Oh Saildog, thou ist contrary...

It's been on that tank for 10 years now and the water tank.

Apparently it was even rated for gasoline.

Epoxy is a bit brittle methinks and polysulphide has done it for me and still does.

I put it on with a roller after a mammoth degreasing session.
Rockter is offline  
Quote Quick Reply Share with Facebook
post #10 of 12 Old 01-19-2008
Senior Member
 
artbyjody's Avatar
 
Join Date: Jan 2008
Location: Bellingham, PNW
Posts: 3,146
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 11
       
Quote:
Originally Posted by ekotopia View Post
Thanx for responds - but does any have a clue to why the sludge and pitting was only on the slanted surface . The bottom I can understand, but why not on verticals?
As of removing the tank -
only in pieces - its 120 Gal. under the side deck next to a center cockpit.
Love to hear more....
Cheers
Its called varnishing...the diesel and whatever containments over time of non-use start a chemical reaction - since fuel evaporates - this becomes more concentrated - and the sludge contains more by products than fuel and thus the aluminum at the bottom gets attacked more ferociously.... large enough tank you may get away with the previous link suggestion I posted...

-- Jody

S/V "
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
" -
1983, Barberis Show 38! or
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.







artbyjody is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Diesel Fuel Tank Woes...or Bonehead mistake of the season rperret Gear & Maintenance 9 10-07-2007 09:32 PM
aluminum diesel tank mary jewell Gear & Maintenance 2 10-05-2004 06:38 AM
Diesel Fuel Essentials Tom Wood Gear and Maintenance Articles 0 03-22-2004 07:00 PM
Replacing the Diesel Tank Sue & Larry Gear and Maintenance Articles 0 09-18-2002 08:00 PM
Diesel Engine Woes Mark Matthews Gear and Maintenance Articles 0 09-19-2001 08:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome