1975 911s Fuel accumulator leak

[ScaryLarry]

Hi I have a 1975 911s that started leaking a moderate amount of gas after starting it. I looked underneath and saw a moderate drip from the passengers side rear, so I immediately shut the car off.

Upon examination, I found a good size puddle of gas under the fuel accumulator, but could not tell where it was coming from.

Today I took the air filter off, turned the ignition on, and pushed on the arm from inside the air filter case and again, there was gas leaking but still can't see where it came from.

The fuel filter is new, and I could not feel any gas on the fuel filter line or the two lines on top of the fuel accumulator.

So my question is, do these accumulators eventually leak? and if so, from the bottom?

Thanks,
Larry

[eastbay]

It is the usual failure scenario

[47silver]

I suspect the new fuel filter is leaking, did you tighten the fittings on each end before you installed?

[john walker's workshop]

Early accumulators generally leak at the bottom screw.

[ScaryLarry]

Thanks for the responses!

I can feel the screw on the bottom, and it has gas on it, so I will be removing it tomorrow.

[ScaryLarry]

Originally Posted by john walker's workshop

Early accumulators generally leak at the bottom screw.

Hi John

Does the screw typically get loose or deteriorated?

Regards,
Larry

[boyt911sc]

Originally Posted by ScaryLarry

Hi John

Does the screw typically get loose or deteriorated?

Regards,
Larry

Larry,

The screw at the bottom of a two-port fuel accumulator is a leak indicator device. The leak is due to the ruptured diaphragm or membrane inside the fuel accumulator. Once the diaphragm is compromised, the residual pressure will be reduced to cause problem during a hot start and will worsen to affect even a cold start. A simple air pressure test could evaluate the condition of a fuel accumulator.

Tony

[ScaryLarry]

Thanks Tony - got it.
I will replace it as soon as I can find 0ne.

Best,
Larry

Originally Posted by boyt911sc

Larry,

The screw at the bottom of a two-port fuel accumulator is a leak indicator device. The leak is due to the ruptured diaphragm or membrane inside the fuel accumulator. Once the diaphragm is compromised, the residual pressure will be reduced to cause problem during a hot start and will worsen to affect even a cold start. A simple air pressure test could evaluate the condition of a fuel accumulator.

Tony