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Old 03-28-2010, 08:04 PM   #1 (permalink)
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Fuel line leaking after metal coupling install

I was feeling pretty good after getting those plastic female fuel line fittings out of my '03's gas tank in one piece. I replaced them with metal fittings (and I put new o rings on the male part of the fittings which were already replaced with metal ones) and now the lower/silver fitting is leaking like a sieve when the bike is running.

I used a proper sealant on the threads and it definitely seems like the leak is occurring where the male and female couplings fit together.

I used 1/4 BSPT Valved CPC Coupling Bodies. Can anyone confirm that I'm using the right size? Any ideas? I'm trying to save a few bucks by just buying the female fittings vs. the full kit from Team Triumph.

Thanks!
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Old 03-28-2010, 08:45 PM   #2 (permalink)
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Does it leak when the male is not connected?
If it does, leak is in female side
If not, it is the male o-ring.
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Old 03-28-2010, 09:04 PM   #3 (permalink)
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Quote:
Originally Posted by staves View Post
I was feeling pretty good after getting those plastic female fuel line fittings out of my '03's gas tank in one piece. I replaced them with metal fittings (and I put new o rings on the male part of the fittings which were already replaced with metal ones) and now the lower/silver fitting is leaking like a sieve when the bike is running.

I used a proper sealant on the threads and it definitely seems like the leak is occurring where the male and female couplings fit together.

I used 1/4 BSPT Valved CPC Coupling Bodies. Can anyone confirm that I'm using the right size? Any ideas? I'm trying to save a few bucks by just buying the female fittings vs. the full kit from Team Triumph.

Thanks!
Where did you get just the female fittings? Cost? I need a set too.
1/4bspt is the correct thread.
Do the female fittings have the "Viton" o rings which are gasoline resistant?
Are you sure the o rings you replaced didn't get damaged when you put the couplings together? (easy to do)
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Old 03-28-2010, 09:57 PM   #4 (permalink)
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Quote:
Originally Posted by PhilM View Post
Where did you get just the female fittings? Cost? I need a set too.
1/4bspt is the correct thread.
Do the female fittings have the "Viton" o rings which are gasoline resistant?
Are you sure the o rings you replaced didn't get damaged when you put the couplings together? (easy to do)
Thanks for the info. Do you mean the o rings on the male fittings? If so, I just got the OEM o rings from Triumph. I feel stupid ordering o rings from Triumph but I had a bunch of other stuff to order.

I definitely could have damaged the new o rings because I've had the tank off five times over the past day.

What size "Viton" o rings are you using? Where can I get them?

I bought the female fittings here for about $30 shipped (in US) for both:

http://quickcouplings.net/osc/produc...dabfc1902f3ccd
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Old 03-28-2010, 09:58 PM   #5 (permalink)
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Quote:
Originally Posted by DEcosse View Post
Does it leak when the male is not connected?
If it does, leak is in female side
If not, it is the male o-ring.
Thanks for the reply. No leak when they're not connected so I suspect I buggered the new o rings with multiple tank removals yesterday.
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Last edited by staves; 03-29-2010 at 10:17 AM.
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Old 03-29-2010, 08:43 AM   #6 (permalink)
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Quote:
Originally Posted by staves View Post
Thanks for the info. Do you mean the o rings on the male fittings? If so, I just got the OEM o rings from Triumph. I feel stupid ordering o rings from Triumph but I had a bunch of other stuff to order.

I definitely could have damaged the new o rings because I've had the tank off five times over the past day.

What size "Viton" o rings are you using? Where can I get them?

I bought the female fittings here for about $30 shipped (in US) for both:

http://quickcouplings.net/osc/produc...dabfc1902f3ccd
I got the viton rings at Autozone but I had to purchase an assortment to get them.
The Buna N o rings in your new female fittings will eventually leak as they are not rated for gasoline. Triumph used Buna N in the original fittings, mine are now leaking when I uncouple them. Fortunately it takes a long time for them to deteriorate. They cannot be replaced.

Your last post said "no leaks when connected', did you mean that?

Last edited by PhilM; 03-29-2010 at 08:50 AM.
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Old 03-29-2010, 10:28 AM   #7 (permalink)
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Quote:
Originally Posted by PhilM View Post
I got the viton rings at Autozone but I had to purchase an assortment to get them.
The Buna N o rings in your new female fittings will eventually leak as they are not rated for gasoline. Triumph used Buna N in the original fittings, mine are now leaking when I uncouple them. Fortunately it takes a long time for them to deteriorate. They cannot be replaced.

Your last post said "no leaks when connected', did you mean that?
Phil - I meant to say they don't leak when disconnected, fixed now in original post.

The ever-so-helpful people at Quickcouplings.net just told me they can sell the correct size Buna N or Viton rings for the male fitting. Buna N @ $0.20/ea. and Viton @ $0.60/ea.

Scott
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Last edited by staves; 03-29-2010 at 10:46 AM.
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Old 03-29-2010, 03:53 PM   #8 (permalink)
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Good to know! Thanks.
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Old 03-29-2010, 04:20 PM   #9 (permalink)
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Phil - I just noticed we have the same year and color Speedy. Nice bike!
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Old 03-30-2010, 06:25 PM   #10 (permalink)
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Phil - I just noticed we have the same year and color Speedy. Nice bike!

Thanks. Just put on a pair of Tec Spec tank pads today.
If you weren't so far away, we could hook up for a ride!
Have relatives in Sheridan, we get up there once a year, ride down around the Starved Rock area.
I ordered a pair of female couplings from "Quickcouplings". Thanks for the lead.

Last edited by PhilM; 03-30-2010 at 06:28 PM.
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