Ducati Monster Forum

Moto Board => Tech => Topic started by: memper on March 21, 2014, 01:44:10 PM

Title: Leaking fuel sender
Post by: memper on March 21, 2014, 01:44:10 PM
96 ss tank. The big nut is metal, but either there is no o ring or its worn out. Cant remember. A shot in the dark but anyone know the size of o ring that goes on the sender?
Could I use Permatex blue (rated for fuel) or should I just get a new ring?
Title: Re: Leaking fuel sender
Post by: koko64 on March 22, 2014, 02:57:38 AM
Get the rubber gasket ring for sure. Check everything under there for a leak.. Better be safe. Imagine a major fuel leak onto the rear cylinder head or exhaust in Summer, right under your balls. :o
Title: Re: Leaking fuel sender
Post by: ducpainter on March 22, 2014, 04:59:34 AM
Sometimes they leak through the potting that seals the wires.

Clean it up and spray some aerosol powder to make sure it's the o-ring.
Title: Re: Leaking fuel sender
Post by: dansamp on March 22, 2014, 07:04:08 AM
Quote from: ducpainter on March 22, 2014, 04:59:34 AM
Sometimes they leak through the potting that seals the wires.

Clean it up and spray some aerosol powder to make sure it's the o-ring.

how would one go about fixing this issue ??
Title: Re: Leaking fuel sender
Post by: ducpainter on March 22, 2014, 07:21:58 AM
Quote from: dansamp on March 22, 2014, 07:04:08 AM
how would one go about fixing this issue ??

Some have had success redoing the epoxy.

If it were me I'd just replace it. The possibility of a leak in that area is not worth saving money IMO.
Title: Re: Leaking fuel sender
Post by: memper on March 22, 2014, 08:15:58 AM
Quote from: ducpainter on March 22, 2014, 04:59:34 AM
Sometimes they leak through the potting that seals the wires.

Clean it up and spray some aerosol powder to make sure it's the o-ring.
I heard about that. Hopefully its the o ring.
Title: Re: Leaking fuel sender
Post by: kokis on March 22, 2014, 12:02:18 PM
Quote from: koko64 on March 22, 2014, 02:57:38 AM
Imagine a major fuel leak onto the rear cylinder head or exhaust in Summer, right under your balls. :o
Nah, it did not ignite from heat just smells bad and scary.
Title: Re: Leaking fuel sender
Post by: memper on March 22, 2014, 12:40:02 PM
Upon closer inspection it is coming from around the nut and not the wires. Turns out I had an extra sender so Im gonna try the o-ring from that one.
Maybe add some permatex blue for extra assurance.
Title: Re: Leaking fuel sender
Post by: ducpainter on March 22, 2014, 12:47:52 PM
Quote from: memper on March 22, 2014, 12:40:02 PM
Upon closer inspection it is coming from around the nut and not the wires. Turns out I had an extra sender so Im gonna try the o-ring from that one.
Maybe add some permatex blue for extra assurance.
I always add some Hylomar when installing those...might be similar to the Permatex Blue.

It lubricates the o-ring as much as seals it.

I learned about lubing o-rings from a buddy that was a submariner.
Title: Re: Leaking fuel sender
Post by: koko64 on March 22, 2014, 03:16:12 PM
Quote from: kokis on March 22, 2014, 12:02:18 PM
Nah, it did not ignite from heat just smells bad and scary.

With the Summers we have here, the risk of a fire from fuel on the rear cylinder/exhaust area is a real possibilty. I wouldnt put my balls on the line for it.
Title: Re: Leaking fuel sender
Post by: kokis on March 22, 2014, 04:26:41 PM
Benzin fires up on ~200 C.
You spend summers in hell? :o :o
But exhaust pipe gets much hotter than 200, watch out for it  [roll]
Title: Re: Leaking fuel sender
Post by: koko64 on March 22, 2014, 04:44:32 PM
I've seen 50C [evil]. The glue melted out of my helmet on Black Saturday.
Title: Re: Leaking fuel sender
Post by: memper on March 23, 2014, 07:45:35 AM
Thanks for the tips guys.
Title: Re: Leaking fuel sender
Post by: memper on March 31, 2014, 12:44:14 PM
In speaking of lubing stuff, do valve cover gaskets (the metal kind) receive any lubricant/sealant or just a clean dry install?
Title: Re: Leaking fuel sender
Post by: Speeddog on March 31, 2014, 02:51:37 PM
Quote from: memper on March 31, 2014, 12:44:14 PM
In speaking of lubing stuff, do valve cover gaskets (the metal kind) receive any lubricant/sealant or just a clean dry install?

If they're the "rubber" coated metal ones, all surfaces clean and dry for install.
Title: Re: Leaking fuel sender
Post by: memper on March 31, 2014, 03:26:20 PM
 [thumbsup]