• Husqvarna Motorcycles Made In Sweden - About 1988 and older

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Alloy Tank Dents

dartyppyt

Husqvarna
Pro Class
I thought I'd share with you how I remove those dang tank dents and the tools I use to get down inside tank, with out damaging the gas cap spout, and creating more damage, etc....

This is my 6th tank that I am working on and I only spent about 15 mins on this one last night. It will probably take me a 1/2 hour to remove this one.

I have picked up most of these tanks smashed and pretty reasonable.I don't think I've had one yet that couldn't be fixed. This tank was creased about an 1/8 of an inch deep that I am removing. I started with my long reach clamp with swivel pads and a piece of angle iron, to start pressing it out. I start by getting it as level a possible. Angle iron is good to start off with because you can use the flat side and it will not flex as you clamp it, as a backing plate.

Then I thought, hey maybe I can help some of you.

I've tried freezing, panel adhesive, heating, etc......

Freezing expands the whole tank and your freezer ends up stinking. I tried one and thought I ruined it cause whole tank started expanding, but after thawing, the dent is still there. I used expensive body panel adhesive and gluing pull studs to tank. Using a dent puller, most studs just popped right off. The alloy is strong and is not as easy the budge like regular auto body panels. It was very expensive and frustrating. Nah, too much trouble. It's also hard to tell how much force to use and you can get a dent going outward instead of inward. So, why not use a technique that works great and you can take your time slowly, with results. Meaning, turning the screw on the clamp, little by little. It's really easy and you'll get the hang of it in a short period of time.

On this particular tank, I have a long crease dent about 1/8 of an inch deep/long.


Step 1

Using a paint stirring stick (Thicker one, free from home improvement store), I wrap 120 grit sand paper around it and sand around dent area to highlight the dent to remove. The stirring stick keeps the sand paper level. You could also spray the area with a light coat of dark grey primer/sand area to highlight your dent's low or high spots.

Tank1_zps47a7cd8c.jpg


Step 2

These are some of the tools I use. 18" long reach swivel, vise grip clamp (Good for pushing from behind and leveling dent). Another set of vise grip clamps with rounded ends (Good for removing creases/bulls eye dents).

I use a piece I cut out of a farm fencing brace ( It enables me to clamp and push dents out from behind while keeping a level surface that is existing).

First pic is fencing brace and swivel clamp in use.

Here is the tools in use and you can see through metal fence brace how much you are pushing dent out to overstretch metal.
Tank2_zps740f9207.jpg


This one is good for pushing dent out and leveling metal flush.

Tank3_zpsd3595667.jpg


This one is good for removing creases.

Tank4_zpseb711713.jpg


Shows concept of clamp used behind metal to push the dent out a little each time/ plus keeping existing metal even. The concept behind this is to overstretch the metal a little to get it back to being flush. Just clamping it to a solid background, still makes the dent low.

Tank5_zps78f2004f.jpg


Step 3

Using a straight edge, review your progress with each pass of your clamp. I also sand each pass, with the paint stirring stick/sand paper, to re highlight dent area, as it's being removed slowly.

Tank6_zps265fa6d1.jpg



Step 4

This shows my progress after about 15 mins of work and sanding to re-highlight my progress. I am after getting the whole dent out first, then I will come back for little dimples, etc... I use a ball bearing duct taped to my saddle clamp for dimples and little creases.

tank7_zps9fb8d07f.jpg



Step 5

Take your time pressing the dent out from behind. Using the clamp as a press, you can turn the vice grip screw a little each time (making a new pass). Do this so you will not over stretch metal, getting dent flush with existing metal. You get to aggressive with turning the screw and you will have your dent outward instead of being flush. As you squeeze the clamp you can watch how much you are pushing the dent out visually.

I work on removing a dent at the deepest point, and slowly working outward.

For removing a dimple or bulls eye. You can duct tape a ball bearing to the swivel clamp, used inside to push dimple out slowly. Then you can use the saddle pads (After bearing is removed) on clamp to help level it out flush.

I also use the rear axle with the nut attached. I can slide it inside of tank used as a backing tool for my body hammer. This helps level any outward impressions in metal making them flush.

Another tip: If you have a stubborn dent that doesn't want to move. You can attach your clamp, wrap the clamping end (screw end that you squeeze to lock)with duct tape, and using a slide hammer/j hook, attach it to the outer clamp tip and pull it out that way, as well. I use duct tape to keep the clamp handle from springing open when pulling with my slide hammer.

I hope this helps you and gives you an idea of how easy this works. Next week I will try to add to this thread and show you how to make a tank cut and reach a dent that is unaccessible. Then weld it up for you. If you don't have a tig welder. you can take it to one and have it welded.

Does this work! Well works good for me and is reasonable.
 
Give me a week and I can show you how to get in the left side with doing a cut on top or bottom. Then you tig weld it back up or take it somewhere to weld.

A couple of ones like yours, I cut the whole side off, where you could not see it and welded it all the way round, back together.

Mine were 10 x worse than that one.

Wish I had one to do a demonstration on.
 
great tip:thumbsup: , i've got a few with some minor dings i'll try it out out, once i get some of those type clamps.
 
Funny, but yes I can do. Ones that bad I just cut apart. I have one under my bench just like that one.

That tank was from an old husky rider racing in hail storm. Poor guy was a die hard husky guy and wouldn't quit. Them Penton and Ktm guys quit!

I had one tank, someone tried welding and burnt huge hole through front. I cut bad area out and welded in new section.
 
Great, I was trying all kinds of stuff, then grabbed on of those clamps. Just need a backing that allows the clamps to slowly push dents out. I squeeze the clamp while watching how much the metal is being pushed/stretched out.

I getting ready to spray a white tank. I trying that new KBS diamond clear. Guess it is really tough stuff and gas doesn't phase it. Also, says we can color sand it/polish like reg clear.

Says 1 to 2 hours between coats.

Going to try it instead of dupont clear coat.

Let you know how it turns out.

Im trying it because it would work great on a frame with base coat and tough like powder coat?

We shall see.
 
I used PPG Deltron when I sprayed the hood off my 1994 Saab 9000CSE to replace the hood my daughter trashed when she totaled my wife's 1997 Saab 9000CS. The Deltron and it's clear coat produce a tough coat that is also flexible enough to use on flexible bumpers and for our purposes Acerbis plastic. I would seriously use PPG Omni Epoxy for frames and even steel fuel tanks.

By the way, what are you using for a base coat under the KBC?

Also thank you for trying my theory using 3M Panel Weld to adhere spot weld studs to the aluminum tanks. If it really does not work I will save the small portion that I bought for something it will work on
 
I am using dupont chromabase.

I have like 3 gals of chromaclear, activator and etc.... left over from cars.

I figured now is the time to use it up. I just got done spraying the clear on my tank. I chickened out and did not use the KBS.

I thought, well let's make a dumb move when I need to try it on like a kickstand or etc.... first.

Kinda glad I did cause it is real humid here and warm. I had to really lay on the clear so it wouldn't orange peel.

Tank turned out great.
 
It has been nice here in CT this weekend with low humidity for a change, nice clear skies and occasional breezes. I played with getting a rear wheel on a 88 KX250 rolling chassis so I can at least just roll it out of the barn when I want some clear floor space. I am working on getting the exhaust system back together on my truck so it can at least be driven now. Suffice to say it has been a major project to replace a transmission cooler line on my 1995 Ram 1500
 
It has been nice here in CT this weekend with low humidity for a change, nice clear skies and occasional breezes. I played with getting a rear wheel on a 88 KX250 rolling chassis so I can at least just roll it out of the barn when I want some clear floor space. I am working on getting the exhaust system back together on my truck so it can at least be driven now. Suffice to say it has been a major project to replace a transmission cooler line on my 1995 Ram 1500
i just redid the ps lines on my dads 06 f150, as the salt got to them...not fun
 
Does this method work for removing triple tree pinch-bolt dents on steel tanks?

Yes, if you can get to them. Flush tank real good so you can heat with oxy and acet torch (steel tank).
Get behind and push out slowly working out towards inwards. When it gets close to being out, heat and cool quickly with ice water and rag. Then towards end get metal red hot again and shoot it with spray air in can turned upside down to super cool it fast. What you are doing is shrinking the metal back to remove the dent. Sometimes the small ones just pop right out first time around.

Aluminum tanks are lil harder but be patient and keep pinching them out. I don't use heat on the aluminum ones due to melting.
 
something we used on my alloy tank to great success

soot the area with the oxy running black as . the go back to hot flame and heat the area u want to work untill the soot burns off . u know its hot but u wont burn a hole in it . we pushed most of my dents out using a panel beaters favourite pokey stick . ( the hood prop from a jap car)
 
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