How long do AC o-rings last?

These are the green o-rings used in automotive AC systems. Do they start to leak after a given time, and where could I obtain new ones? I bought a box of them at an autoparts store, but it didn't have most of the sizes that are needed for my 1994 Taurus.

Bliss2010-07-09T22:35:41Z

Favorite Answer

Go to a dealer to get the right size, our dealer always stocked all the sizes mainly for the service dept.

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Eric F2010-07-10T02:43:29Z

they're a nitrile rubber, they'll last longer than the regular rubber.

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