Loose hose does what?

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H.J. Kamps - 12 Sep 2003 02:18 GMT

I took my air filter off again to have a closer look, and under the air
filter, there were two hoses connecting the air-intake thingie to metal
pipes. One metal pipe (still connected) disappears somewhere towards the
back of the car, and one metal pipe (not connected) runs somewhere to the
front right of the car, to disappear under a plastic air duct.

The metal pipes are rather small, not unlike the pipes running the brake
fluid from the brake fluid reservoir.

What are these pipes for? It is quite dirty, and gives the impression that
it hasn't been connected for a good while. Should I try to reconnect it?

HJ

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Graham - 12 Sep 2003 07:11 GMT

> I took my air filter off again to have a closer look, and under the
> air filter, there were two hoses connecting the air-intake thingie
[quoted text clipped - 9 lines]
> impression that it hasn't been connected for a good while. Should I
> try to reconnect it?

We could do with some more clues about which thingies and what sort of a
thingamajig we're talking about here.

Let's start with:
Is this a 1959 Mini 848, a 1969 Californian delivered Cooper S, a 1978
Aussie Clubman with full ADR27A anti pollution gear, a 1989 UK car with
EEC anti pollution gear or a 1998 twin point injected car? Each will
have quite different plumbing!

Now what exactly is this air intake thingie? The manifold? The carby or
throttle body? The air filter? What is the mystery plastic air duct and
where is it located? Does it lead to the air filter or to the heater?

The metal pipes sound like vacuum lines. A vacuum line to the rear of
the car is probably something to do with fuel vapour recovery, but
exactly how it is arranged will depend on whether it's a 1969
Californian delivered... (etc).

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-AD- - 12 Sep 2003 07:38 GMT

And H.J. Kamps was sitting next to Elvis in the spaceship, which I thought
was kinda strange, but then they turned to me and said:

> I took my air filter off again to have a closer look, and under the air
> filter, there were two hoses connecting the air-intake thingie to metal
> pipes. One metal pipe (still connected) disappears somewhere towards the
> back of the car,

Fuel supply pipe. It goes to the fuel pump.

> and one metal pipe (not connected) runs somewhere to the
> front right of the car, to disappear under a plastic air duct.

Fuel overflow pipe. Designed to drain fuel away safely if the float valve
in the carb develops a fault.

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H.J. Kamps - 12 Sep 2003 10:24 GMT

> Fuel supply pipe. It goes to the fuel pump.
>
[quoted text clipped - 3 lines]
> Fuel overflow pipe. Designed to drain fuel away safely if the float valve
> in the carb develops a fault.

Aha. That sounds about right. And it would make sense that it would have to
be connected, then... Hmm. I'll do something about that.

Thanks!

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