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19-11-2010, 10:36
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#31
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Registered User
Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
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Thanks for all the posts, as I am doing these very repairs this week. I have cut 4 access ports into the top of my aft keel to convert it to fuel storage. 3 of the ports get welded back. One will have a bolted on cover. I have scaled out all the rust. After sand blasting the inside, what a good coating to to apply inside the tank?
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20-11-2010, 01:43
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#32
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Registered User
Join Date: Mar 2009
Location: Australia, Hervey Bay QLD
Boat: Boden 36 Triple chine long keel steel, named Nekeyah
Posts: 909
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Matt, To a certain extent it depends on how thick the steel is. The thicker the plate, the longer it will take for corrosion to be a problem.
Our keel is tank 1" on the bottom, and 1/2" on top and sides. The interior of the fuel tank is unpainted.
I figured that getting a reliable paint film inside a keel tank was pretty difficult. Also was worried that if paint started falling off there would be real problems with blockages.
The tank has worked well for 25 years. Will inspect it in a couple of years - should be interesting.
Regards, Richard.
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27-02-2011, 14:29
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#33
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Registered User
Join Date: Jun 2010
Boat: (Contessa 26, Nicholson 35), Norseman 400
Posts: 7
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Re: What Gasket Material for Diesel Tank Inspection Port ?
I see that this post is a few months old, but I'm also looking for diesel tank gasket material. My question is why has nobody mentioned cork? It's cheap and easy to cut and I used it on a previous boat with no problems. Is there anything wrong with using cork?
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27-02-2011, 14:47
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#34
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Registered User
Join Date: Nov 2010
Location: Jacksonville Florida
Boat: 1972 Tartan 34C Fleur De Mer
Posts: 141
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Re: What Gasket Material for Diesel Tank Inspection Port ?
Nope 'sept the cork will dry out eventually.
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27-02-2011, 16:24
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#35
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Registered User
Join Date: Mar 2003
Location: Philippines in the winters
Boat: It’s in French Polynesia now
Posts: 11,368
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Re: What Gasket Material for Diesel Tank Inspection Port ?
If there is any biodiesel (methyl Oleate) in the mix then Teflon, Viton, and Nylon have very little reaction to biodiesel and are among the materials that can be used to update incompatible equipment.
Viton would be my choice because it compresses much better.
And if theses are not available then cork works but does ooz over time. It won't dry out if the boats in motion. Cork is what is used for fuel site equipment.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
The measure of a man is how he navigates to a proper shore in the midst of a storm!
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27-02-2011, 18:05
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#36
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Marine Service Provider
Join Date: Feb 2011
Location: St Petersburg, FL
Boat: 18' Banno USA Old World
Posts: 78
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Re: What Gasket Material for Diesel Tank Inspection Port ?
With cleaning fuel tanks we often have to cut holes, make plates, drill & tap bolt holes and replace gaskets. We get our rubber gasket material from Goodyear Rubber, when we need cork we go to Office Supply (cork sheets 2'X3').
__________________
Absolute,
"Suckin Sludge & Havin a Gas"
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28-02-2011, 05:45
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#37
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,538
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Re: What Gasket Material for Diesel Tank Inspection Port ?
Quote:
Originally Posted by simonthesailor
... Is there anything wrong with using cork?
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Cork is compatible with both diesel & gasoline.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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28-02-2011, 06:44
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#38
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Moderator Emeritus
Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
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Re: What Gasket Material for Diesel Tank Inspection Port ?
I have seen inspection kits that include Vitron seals. All my tanks 1 water 2 fuel are stainless and have Vitron seals on the inspection ports to access all the baffles. After 20 years they seem just fine. Cork engine seals are fine but you always torque to specification. With a thick squishy Vitron seal you just can't mess up and nothing bothers them. If the tank isn't totally rigid you'll have a little extra seal thickness.
__________________
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
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28-02-2011, 10:17
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#39
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Registered User
Join Date: Jun 2010
Boat: (Contessa 26, Nicholson 35), Norseman 400
Posts: 7
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Re: What Gasket Material for Diesel Tank Inspection Port ?
Appreciate all the advice. I'm going to go with cork, especially as my inspection port is on the top of the tank so leakage is less likely (than if it was on the side).
Thanks!
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21-10-2011, 18:47
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#40
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Registered User
Join Date: Aug 2011
Location: COMOX
Boat: CS 40
Posts: 224
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I need to make gasket for my diesel tank it is to seal pick up pipe for my walles heater think I will go with. Vilton rubber
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21-10-2011, 18:49
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#41
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Registered User
Join Date: Aug 2011
Location: COMOX
Boat: CS 40
Posts: 224
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Sorry for my spelling viltron rubber
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23-10-2011, 07:57
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#42
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Registered User
Join Date: Apr 2010
Location: Newport News VA
Boat: Egg Harbor sedan cruiser 1970
Posts: 958
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Re: What Gasket Material for Diesel Tank Inspection Port ?
instead of a hole punch, take a propane torch and a nail.
Heat nail red hot and burn what ever hole size you want thru the gasket.
or perhaps a sharp drill bit. The hot nail makes a clean hole.
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23-10-2011, 10:49
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#43
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Registered User
Join Date: Mar 2003
Location: Philippines in the winters
Boat: It’s in French Polynesia now
Posts: 11,368
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Re: What Gasket Material for Diesel Tank Inspection Port ?
Quote:
Originally Posted by COLINFLTENG
Sorry for my spelling viltron rubber
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Actually that's Viton®.
And here's an excellent chart of synthetics for compatibility of chems/materials >> Cole-Parmer: Chemical Resistance Database
Although, it doesn't have cork. But if the cork is mixed with a compatible rubber/synthetic is seals well but it's life span will degrade with time. >>> http://www.gasketwiki.com/index.php?..._Rubber_Gasket
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
The measure of a man is how he navigates to a proper shore in the midst of a storm!
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24-10-2011, 17:03
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#44
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Registered User
Join Date: Aug 2011
Location: COMOX
Boat: CS 40
Posts: 224
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Thanks spelling not very good ended not vilton rubber could not hands on it ended with nitrile rubber also known as Buna-N just got to make gasket now Cheers
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24-10-2011, 17:25
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#45
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Registered User
Join Date: Jul 2007
Location: W Florida
Boat: Still have the 33yo Jon boat. But now a CATAMARAN. Nice little 18' Bay Cat.
Posts: 7,086
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Re: What Gasket Material for Diesel Tank Inspection Port ?
Quote:
Originally Posted by rebel heart
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Not that I would use that in this case but I have used for lots of things. It is really great stuff.
And I know a guy who helped a poor person reassemble a gas engine who could not afford the gasket kit. Yep. Permatex Ultra Blue. Said it ran fine. Don't know how long though.
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Who knows what is next.
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