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Fuel tank repair

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b4himdude:
Hey, has anybody ever had any luck trying to repair a small crack in their stock k5 fuel tank.?if so what did you use to fill the crack it bind the plastic.?ive tried a couple things. It's tough though. I think of it like a fish tank ( if theirs a seam to repair best repairs seen to do better if you repair the inside. Because the pressure of the liquid pushes the repair into the hole) but it is really tough to get to the inside much on a fuel tank. Anyway just wondering if I'm just destined to search eBay for a good used tank. Anyway any success however your method of repair might have been, I'd love to hear it

Foxx4Beaver:
there are guys out there that do plastic welding, and are good at it....but....when it comes to fuel tanks, or anything involving fuels/accelerants...I myself always opt for a replacement.
no need to go down in a "blaze of glory"...literally. :wink:  

b4himdude:
Ya no kidding. Well I guess the only good thing is that I can do some shopping around . At least the crack is up high on the tank. I suppose I should drill the ends of it so it doesn't grow on me . I wonder if that holds true in splits in plastic as it does metal. Thanks Foxx , kinda what I was thinking. Although they fuse Driscoll pipe there in my dads shop at Newmont gold. Maybe I can drain it, fill it with water and rinse it. Then see if he can take it there and fuse it. But that's kinda the feeling I had with the epoxy. I even tried doing it from the inside by pressing the wpoxy down with a long thin stick. Couldn't really rough it up with sandpaper. Getting good  light in there was a frustrating feat in itself. Had to try.

tkeen511:
When I was restoring my old 72 Kawasaki s2 (2 stroke 350) I used an epoxy called caswell. Stuff worked wonders. It's a little pricey though, but I'd just use it on the whole tank. Not sure if it will work for a hole though. Harbor freight also sells a little plastic welding kit pretty cheap. I might tack a piece of plastic on there, then use the caswell. But honestly I'd just save yourself the headache and get a different tank

Brute:
I picked up both soldering iron and hot air type 'plastic welder' tools plus trying my own 'home made' tool. After using them and spending hours playing I can say definitely say I am NOT impressed with the strength or durability of the welds.
While they can be 'Ok' I don't think they are as good as the original products strength. As with most repairing you have to be careful to not screw it up worse (overheating being #1) because then you have more of a mess.
Best take it to someone that does it a lot or practice on the EXACT material you are going to attempt the repair on. Best of luck!

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