Fuel pump 0-rings: re-use, or aftermarket - Saab 900 Bulletin Board - Saabnet.com
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Fuel pump 0-rings: re-use, or aftermarket
Posted by RayF (more from RayF) on Sat, 31 Jan 2015 06:17:51
In Reply to: Check valve 0-rings (feed and return), JonH, Sat, 31 Jan 2015 05:40:38
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Jon - -
I dealt with this last summer and ended up buying new o-rings from an industrial supplier near me, Seals Unlimited. I can't remember the size but I bought extras and left them in a marked baggie with the size on it.
I had made the mistake of leaving the tank open without a pump in it and the fuel lines jutting out over the full gas tank, and they were dipped in the gas overnight and swelled up so bad they wouldn't reinsert without cutting or risking breaking a fitting.
Temporarily, I carefully removed them and let them sit a day on a sunny dash and they shrank back to size, but one had a cut in it from trying to get it to go in.
Take one to a seals place, or take along (I had one from a junkyard) an old check valve, or measure diameter of bore and diameter of bottom of groove with a digital micrometer, cheap these days at Harbor Freight. They are metric - - no hardware store seems to sell metric o-rings and the closest I found in US plumbing o-rings, (Number 8, maybe?) wasn't the correct size.
If I dig through to the car trunk where my parts are sitting today I'll post the size on here.
I think Vaseline is a fine lube for this; they are after all meant to resist gasoline. But you can use silicone grease or any oil you can come up with including rubbing your finger alongside your nose and then rubbing the o-rings. They should insert easily without any fight, if the size is right and they're not gas-swollen.
posted by 71.173.7...
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