My understanding is that the knob was to prevent any exhaust fumes from
entering the cockpit.
Mike
'79B
On 11/21/2010 5:23 PM, Max Heim wrote:
> There is a rubber tube with a squeeze bulb on the end at the bottom of the
> air box. You can reach it from under the car.
>
> I don't understand the purpose of the squeeze bulb -- it just fills up with
> grunge that requires cleaning out. Why not just have an open tube? But there
> it is.
>
>
> --
>
> Max Heim
> '66 MGB GHN3L76149
> If you're near Mountain View, CA,
> it's the primer red one with chrome wires
>
>
>
>
> on 11/21/10 1:03 PM, Simon Matthews at simon.d.matthews@gmail.com wrote:
>
>> My recently acquired MGB is leaking water into the passenger footwell
>> (it drips off the panel under the dash). I assume this is due to water
>> entering the heater vent in from of the windscreen and leaking from
>> there into the car. I seem to recall that the heater air intake should
>> have some water drains that need periodic cleaning, but I can't find
>> instructions on doing this.
>>
>> Can anyone help me with instructions on how to clear these drains?
>>
>> Simon
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