A. B. Bonds wrote:
>
> In <32B9B79F.5ED8@pacbell.net>, Jarl/Carol wrote:
>
> >The answer is: it depends, but while in motion, it generally flows from
> >the air cleaner to the valve cover if everything is in good shape. The
> >"road draft" tube mounted on the side cover extends down into the
> >airflow underneath the car at a slight angle. The air passing by gives a
> >venturi effect and creates a slight vacuum in the crankcase which
> >removes blowby gases and keeps the oil from becoming diluted by the
> >unburned gasoline component of blowby. With the engine in good
> >condition, makeup air is needed because there isn't enough blowby and by
> >getting it from the air cleaner, it is filtered and cleaned before it is
> >sucked into the crankcase.
>
> Hmm. My recollection is that the pipe into the air cleaner is hooked
> to the outside of the air cleaner cup, which means that what it
> receives won't be filtered.
That "pipe" originally was packed with filter material.
> My question to you is what are the two BSF 1/4" bolts on the side of
> the valve cover for? My car (ex-Galt) came with an aluminum
> coffin-type cover and I only recently found a real cover. Just
> curious.
> Regards A. B.
On a TC there are two little "legs" that support the air cleaner
cannister as it lies across the valve cover. They form a triangle with
those screws at the base ends. Jarl
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