Nolan Penney wrote:
>
> > Good news and bad news. Bad news is that it failed the full-tank
>test.
> > Good news is that I think I know why. The liquid nature of sealants act
> > as a lubricant to the surface of the neoprene gasket. As the mounting
> > screws are tightened, the gasket tends to 'ooze' and deform. I know that
> > this happened.
>
> Did you not let the stuff set up prior to assembly? It sounds a lot to me
>like you slathered
> it on, and promptly stuck the parts together. That is a way to make sure
>liquid gaskets
> fail. You really and truly are supposed to do what they say, let it sit
>exposed to air until
> it pretty well sets up to a hard tack. If it's wet, it does just as you've
>described, and
> promptly leaks. Be it Yamabond, permatex or any liquid gasket or gasket
>sealant. Parts
> cannot be assembled with the stuff on them wet, no matter how much you slap
>on. A thin
> layer, allowed to set up, is what works.
>
> I didn't realize you weren't using any gasket whatsoever in there either.
>While I am not
> familiar with the assembly and installation of those sending units, many of
>the types I am
> familiar with require the use of a gasket for tension. Ie, the screw ring
>tightens by
> pressing against a gasket and the sending unit. If there is no gasket,
>there absolutely
> will not be enough tension to ever ensure a seal.
>
> I went and looked as Lazarus, very nice! I take it that's you and the
>missus? I can well
> see why your daughter thought you killed it when she saw it. Heck, I'd think
>it was dead!
> If I stacked up a car like that I'd get a hundred zillion dents and scratches
>on the body
> parts. You are obviously a far better stacker then I.
Hi Nolan,
The Yamabond label suggests a one minute drying tome before assembly. I
gave it about ten minutes. Ambient was about 50-55F. Among the problems
of this sending unit system is the fact that the unit is made of a very
soft metal. Tightening the screws causes the flange to distort into a
cup shape using the hole in the gasket as a form. There a six mounting
screws on about a 2.5" bolt circle. It would appear that the threaded
portions surrounding the hole in the tank may be some sort of an insert.
If you check out Yamabond using Yahoo you will find some service
bulletins about its use. In one occassion it is used in lieu of a head
gasket! I haven't yet tried it without a gasket. That may come. I was
able to talk Gerry Goguen, the owner of Abingdon Spares, into sending me
his last cork gasket. That'll be for tomorrow night's adventure. If this
Nor'easter blows over by then.
Lazarus' parts were actually stacked with cushioning between them, even
though they were heading for bead-blasting. He had had at least two
paint jobs since the factory. The last was done with swabs, I would say.
Indeed, that is the missus. Thirty-nine years ago we drove one of them,
as newly-weds, from here to San Diego. It wasn't long before we
discovered the lack of a place to carry a bassinet and sold the TD. Said
that we'd get another some day. Here he is.
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