[T3] Fuel leak on type 3 F.I. Fastback

[William Jahn]

I didn't read he was smelling gas so it might be brake fluid and if it is
gas I forgot the steel lines don't have a barbs on them I know they don't
on the rear yet I can't recall if mine do on the front or at the tank . I
only replaced the ones on the engine and from the engine to the rear metal
lines. I don't know if all years were the same deal. Jim has replaced more
than I have. I think the return at the tank has no barb nor did the plastic
three way fitting . Sort of a dumb idea at least on the pressure side .

On Tue, Nov 5, 2019 at 5:54 AM Jim Adney <jadney at vwtype3.org> wrote:

> On 4 Nov 2019 at 10:25, Arthur Sterrett wrote:
>
> > My fastback has developed a fuel leak which appears to be coming from in
> the
> > tunnel!
>
> It's most likely that the steel lines are fine, but there's a leak at
> the hose connection at one end which is dribbling/spraying back into
> the inside of the car. Check the driver's side first, as the
> pressurized line is more likely to be the problem.
>
> Those 4 connections are more troublesome because the steel tubes
> there do not have barbs or bulges on them, which would help seal the
> hoses. The straight cylindrical tube needs a full circle clamp and
> the usual worm gear hose clamp doesn't do that job; it leaves a loose
> spot at each end of the "buckle" where they tend to leak.
>
> At those 4 spots, use either a special FI clamp, available at your
> FLAPS, or one of the plastic click/ratchet clamps. Those all do a
> good job. I use a standard (small diameter) worm gear clamp to grip
> the hose on the tube plus a plastic click/ratchet clamp to give full
> circle sealing.
>
> Another possibility is that what you're seeing is not gas, but brake
> fluid. The usual failure modes for our brake system is a master
> cylinder that is leaking out the mouth or the line under the gas
> pedal that has rusted thru and sprays out each time you press on the
> pedal.
>
> Brake fluid mixes completely with plain water; gas does not.
>
> If you're sure it's a rusted out gas tube, you could try compressed
> air to see which one leaks, but that means disconnecting the hoses on
> both ends so you can seal up the tube and leak test it alone.
>
> Jim
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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