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Help..Fuel tank leaking from drain plug

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Old 05-03-10, 11:48 PM
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TX Help..Fuel tank leaking from drain plug

We drained the fuel this weekend and now i have a slow leak coming from the drain plug. I did a search but not much. Any ideas how to fix it or should i replace the tank

One thing that look a little odd to me was where the drain plug goes there are 3 very small holes in the first thread going into the tank. The holes are symetrical so i assume they should be there.
Old 05-04-10, 08:33 AM
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Anyone???
Old 05-04-10, 10:46 AM
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new drain plug gasket or some sealant?
Old 05-04-10, 10:53 AM
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there might be some gas resistant sealant that goes on there.
Old 05-04-10, 03:05 PM
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Not sure how it seals to the tank stock, but I'd find a copper crush washer to go between the plug and the tank. That will solve the problem 100%.

You can probably get one at a parts store that's designed for an oil pan drain plug.

Fooling with any sealant would be a gamble, gas reacts poorly with so much stuff. A good ol' crush washer would be foolproof.

Dale
Old 05-04-10, 10:18 PM
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That or some teflon tape. That's what happened to me a couple weeks ago and that's what I did to fix it. For those kinds of connections, I wouldn't use any sealant other than the tape. It's fine for this application.
Old 05-19-10, 12:25 AM
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ha, i was thinking that! thank God for the search button...and thank you Dale for confirming.
Old 05-19-10, 03:23 PM
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There is supposed to be a crush washer there.
Old 05-19-10, 04:13 PM
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^^yeah, i drained mine and now it's leaking. i guess to make it seal i had to either tighten in the same position or use a new one (don't wanna buy OEM and pay like $5 for a crush washer)

small drip leak but any leak worries me. thanks again guys.
Old 05-19-10, 04:47 PM
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hmmm ...

5$ vs. me leaking gas & potentially causing a car fire that destroys my property, endangers myself and others around me .




.... let me think about that.
Old 05-19-10, 04:52 PM
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You don't need to buy it from mazda, just take it to the hardware store and find a crush washer that fits, they're like $1. It's just a threaded metric bolt, M10 if I remember correctly.
Old 05-19-10, 04:52 PM
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You can always anneal the old crush washer(assuming itis copper).
Old 05-19-10, 06:28 PM
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My leak is fixed....
Old 05-19-10, 08:19 PM
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Nice work!
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