[T3] Fuel leak on type 3 F.I. Fastback
Jim Adney
jadney at vwtype3.org
Tue Nov 5 05:54:39 PST 2019
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
*******************************
More information about the type3-vwtype3.org
mailing list