patching a fuel tank - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
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post #1 of 15 (permalink) Old 07-21-2016, 04:06 PM Thread Starter
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patching a fuel tank

I have a fuel tank from a VN that has several tiny pinholes from rust. I was going to go get putty, but then I thought maybe a spray over the whole thing would seal all the little pinholes. Is there a spray I could get at an auto parts store that would do a good job?

What else do you recommend?


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post #2 of 15 (permalink) Old 07-21-2016, 05:22 PM
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I've used Petseal in the past, works really well

https://www.amazon.co.uk/Petseal-Ult.../dp/B006VB6E02
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Man can not live by bread alone... he needs Duct tape & WD40
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post #3 of 15 (permalink) Old 07-21-2016, 09:11 PM Thread Starter
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Thank ya, I'm hoping to find something I can get locally for time reasons, but if not I'll explore other options.


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post #4 of 15 (permalink) Old 07-22-2016, 01:25 AM
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Por-15 works good but you have to make sure that there is ZERO rust inside the tank. Where there's any rust the liner won't stick and will cause all kinds of problems.
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post #5 of 15 (permalink) Old 07-22-2016, 01:40 AM Thread Starter
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I can't eliminate the factors on the inside, but I can do anything I want to the outside. This is all underneath on the belly of the tank.


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(2) 1994 Vulcan VN750 (red)

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post #6 of 15 (permalink) Old 07-22-2016, 11:39 AM
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Duct tape to the rescue. No? How about some gum.

Okay for reals this time. You can try welding it or soldering it. Or try using those epoxy that are meant to seal radiator. Also there are some fuel tank repair kits.
Something like this
Permatex 12020 Gas Tank Repair Patch | eBay

Don't take my word for it. I'm just a foolish newbie.
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post #7 of 15 (permalink) Old 07-22-2016, 12:39 PM Thread Starter
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I have a welder just trying not to blow myself up. Guess I'll fill it with water or something.


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post #8 of 15 (permalink) Old 07-22-2016, 02:07 PM
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If you have pinholes, you have rust. If you don't take care of the rust whatever you do will just be a bandaid. You'll have to sand off the paint to see how bad it is on the outside and choose one of the many options to get rid of the rust on the inside. I've had good results with plumbers solder. I did try to braze a tank once. I forgot that particular tank was double walled and the ball of flames that went off made me think twice. If you fill it with water, you'll never get it up to temp without turning the water into steam.
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post #9 of 15 (permalink) Old 07-22-2016, 05:57 PM
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Quote:
Originally Posted by evulcannibal View Post
Duct tape to the rescue. No? How about some gum.

Okay for reals this time. You can try welding it or soldering it. Or try using those epoxy that are meant to seal radiator. Also there are some fuel tank repair kits.
Something like this
Permatex 12020 Gas Tank Repair Patch | eBay
This. Sealed a large crack in a dented tank with it and it never leaked. (Wasn't pretty, but did the job)

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post #10 of 15 (permalink) Old 07-22-2016, 07:07 PM
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Quote:
Originally Posted by Rakillia View Post
Por-15 works good but you have to make sure that there is ZERO rust inside the tank. Where there's any rust the liner won't stick and will cause all kinds of problems.
Quote:
Originally Posted by One1 View Post
I can't eliminate the factors on the inside, but I can do anything I want to the outside. This is all underneath on the belly of the tank.
No matter what you use, the inside has to free of rust or there will be rust in the carbs very soon. It is just a fact. Fuel goes inside the tank and mixes with the rust and flows to the carbs. The fuel will loosen the rust so it makes it to the carbs for sure. I advise against anything that does not address the problem inside the tank. right now your tank leaks and soon you will have a tank that messes the carbs. That is a bigger problem.

and always remember, "Ride until you rot!"
**Really not sure if the Big "C" is back right now
but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

Tom
Vulcan 2000
New ride: 2009 Victory Vision Arlen Ness Signature Series
4507 miles
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