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What do you think caused this?


I know I just replied, but something didn't seem complete about my reply, so here it is.

Do you know how brand new assembled gas tanks are tested for leaks? Once the tank is assembled to be shipped to the automaker, before it can pass final inspection, each tank is placed inside of a sealed chamber and helium is pumped inside and out of the tank. If helium can get past the seals, so can gasoline. It's the ultimate leak finder- helium. So let me tell you something else; even the smallest, narrowest friggin' chin hair underneath the o-rings will cause a leak. You absolutely and positively must ensure your o-rings, locking ring, and encapsulated ring (the one moulded into the tank) are totally spot free. Otherwise you will have a leak. When I replaced the gas tank on my '84 two months ago, I made darn sure those were spotless.

If you have even the smallest gouge on the surface beneath the o-rings. You will have a leak. Any imperfection on underside of your o-rings will be a good source for a leak.

Forgot to explain that. Hope that helps you and others understand.
 
Last edited:
:poop:





old tanks i will usually just make my own sender plate or a lock nut out of 10gauge...or a custom fat bastard o ring. i have o ring stock and super glue. get er did.
 

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