Cracked gas tank! - Snowblower Forum : Snow Blower Forums
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post #1 of 16 Old 03-19-2020, 02:13 PM Thread Starter
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Cracked gas tank!

Hey All!

I recently got a 10 horse Snow King to work on for a re-power project....I cleaned out the gas tank and cleaned off the grime on the outside, no big deal.


About a month later I put some gas in it and got it to run pretty well.


Maybe less than a week later I saw the gas tank was about destroyed...all cracked and I'm sure it was ready to leak all over...the tank was fairly cherry before.






Has anyone experienced anything like this?!.it's just a plastic gas tank under normal operating conditions...dang!


Thanks for looking,


John
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post #2 of 16 Old 03-19-2020, 02:24 PM
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From your second photo, it looks like the tank is exposed. I wonder if this machine was stored outdoors with significant exposure to the sun. UV rays can cause plastic to deteriorate and become very brittle in spite of a “normal appearance”.

Last edited by CO Snow; 03-19-2020 at 02:26 PM.
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post #3 of 16 Old 03-19-2020, 02:56 PM
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I have not seen that level of cracking, but I have had several 20 to 30 year old machines that had cracks developing in the tanks. Some near the fill hole and others on the bottom near attachment features of the tank. And outside storage can speed up damage to the plastic, just like in cars (think of the old cracked dashboards).

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post #4 of 16 Old 03-19-2020, 06:14 PM
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Wow, no, I've never seen a tank look like that. Tanks are commonly HDPE (High Density Polyethylene), which is usually pretty resilient. As was mentioned, presumably a lot of UV exposure could damage it, but wow, that's pretty bad.

Fortunately there are a ton of Snow King engines, so hopefully a new tank will be readily available, and reasonably priced.

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post #5 of 16 Old 03-19-2020, 08:46 PM
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That's called crazing. It can result from residual tensile stresses in the plastic. Link
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post #6 of 16 Old 03-19-2020, 11:40 PM
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i had something similar happen on a snowblower i got from my BIL. all was good till i decided to clean the old paint off it. it pretty much just fell apart after that and i know he stored it in his garage when not in use.

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post #7 of 16 Old 03-20-2020, 01:01 AM
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That is a common occurrence with the tanks being made of recycled plastic.
Recycled material is scrap material to begin with that is just broken down, ground up into powder or melted down and re-formed into another shape, all using the scrap material.
The material was "Scrap" to begin with, meaning its useful life was no longer any good anymore, and just because it was "Re-Shaped" into something else, does not mean it will be good as new again, just the opposite.
It started out as "Scrap" and will always be "Scrap" no matter what is done to it. The material doesn't have an "Indefinite Life", and in time has to be returned back to the ground where it originally came from, it only lasts for so long.
That goes for all "Recycled" products, metals, steel, aluminum, plastics of every type and all other things made of "Recycled" materials. That is a big reason automobile parts don't last long, parts like body panels for example.

Last edited by ST1100A; 03-20-2020 at 02:31 PM.
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post #8 of 16 Old 03-20-2020, 09:33 AM Thread Starter
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Quote:
Originally Posted by badbmwbrad View Post
That's called crazing. It can result from residual tensile stresses in the plastic. Link

Thanks for the link Brad...and thanks for all the reples! I appreciate the time and input!!

So strange and so quick to develop.


John
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post #9 of 16 Old 03-21-2020, 12:32 AM
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Garage
I learned Pb blaster will damage plastic


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post #10 of 16 Old 03-21-2020, 08:58 AM
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Groomerz - are you sure ? I cannot not find anyone supporting this claim.
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