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fastfredracing's Avatar
 
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Popping out a gas tank dent, any tricks ?

Finally grabbed up a dual sport . Got an 1989 Yamaha xt 350 with a broken piston. Gonna be a little winter project for me . So, it has a steel tank ,and of course , there is a nice sized dent right in the side.
Any good tricks? The dent is in a place that I cannot really get good access from inside the tank, so I cannot really bang it out that way .
I guess I can flush the life out of the tank and use a stud gun dent puller if I have to , but I would rather not . Fill with water and freeze? Suction cups ?
I am sure I could google it , but you guys are more fun .

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Old 10-10-2016, 05:11 PM
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Congrats on your new scooter, Fred!

I wonder if it would make sense to buy a new tank...either used or after market?

If yours could be fixed, someone here would know.

Can you post a couple pics?
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Old 10-10-2016, 05:30 PM
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Drain all but a little gas from it, drop a match in ...
Old 10-10-2016, 05:30 PM
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Get one of these!

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Old 10-10-2016, 05:38 PM
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Seal it and use air was the old technique.....
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Old 10-10-2016, 06:52 PM
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^^ Bloody scary - that technique - if you ask me. Make sure to take all the necessary precautions because the potential of bad $chitt happening with any pneumatic testing or process.

Cheers
JB
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Old 10-11-2016, 10:00 AM
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Quote:
Originally Posted by Hawkeye's-911T View Post
^^ Bloody scary - that technique - if you ask me. Make sure to take all the necessary precautions because the potential of bad $chitt happening with any pneumatic testing or process.

Cheers
JB
If you're referring to the T-Hotbox above, I think it's done with heat.
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Old 10-11-2016, 10:55 AM
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Quote:
Originally Posted by Hawkeye's-911T View Post
^^ Bloody scary - that technique - if you ask me. Make sure to take all the necessary precautions because the potential of bad $chitt happening with any pneumatic testing or process.

Cheers
JB
It should be 99% water, 1% air...
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Old 10-11-2016, 11:12 AM
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What about the hot glue packages? They are cheap on Amazon.
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Old 10-11-2016, 11:13 AM
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I just did it this morning on a Unimog tank that was dented on the bottom pretty good, Just blocked off all the ports and put the air to it. Popped out all dents and looks as good as new!
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Old 10-11-2016, 11:14 AM
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Quote:
Originally Posted by 1990C4S View Post
What about the hot glue packages? They are cheap on Amazon.
Lots of YouTube vids showing success.
I've got a slight tank dent in my '75 Yam. DT400 that I need to address.
I may try this method first.
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Old 10-11-2016, 01:12 PM
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Depending on how big, where it is, and how badly the metal has stretched....

Heat with blowtorch. Good and hot.

Ice water.

Used to do with to remove dents from armor all the time.

Of course, you'll have to repaint.

Powerful suction cup maybe. I've managed to pull out a couple using one.
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Old 10-11-2016, 02:02 PM
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Quote:
Originally Posted by manbridge 74 View Post
Seal it and use air was the old technique.....
I ruined a good tank once using air pressure....The bottom of both side bowed away from the frame.....Looked like the Droppy ears on an old Hound Dog...
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Old 10-11-2016, 03:35 PM
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You don't need much pressure

Put a bit in and use a hammer to gently tap around the edges of the dent
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Old 10-11-2016, 04:04 PM
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Tim Hancock posted pics working out a dent one time. Pm him!
Old 10-11-2016, 07:06 PM
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Originally Posted by porsche4life View Post
Tim Hancock posted pics working out a dent one time. Pm him!
http://forums.pelicanparts.com/off-topic-discussions/406169-new-project-cb450-soon-cafe-racer.html
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Old 10-11-2016, 07:22 PM
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Use them all at once ?:
-Metal straps or vice to contain and maintain everything.
-Internal pressure.
-External pull studs.
-Heating everything with spot cooling center to quick shrink (nitrogen dry ice?).
-Tapping edges (but metal is stretched and weak there).
-Pushing from inside like PDR.

Old 10-11-2016, 07:23 PM
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