Re: Camshaft Vent Question

["Mark Battley" <m.battley@domain.elided>]

>>...the pipe leading from the cam box went directly
>>into the old air plenum, and did not go through a separator of any kind...
>>just directly into the airbox. 
>
>That's how the cars were assembled.  A rubber hose connected the stack on
>the right side of the cam cover to a nipple on the airbox.  There was no
>oil separator like on the SPICA-injected cars.  I don't know why it was
>thought to be necessary on the injected cars and not on the carbureted ones. 
>
>> The other hose I was talking about leads directly from the intake manifold,
>>the rightmost part closest to the radiator, and headed into the old air
>>plenum. I might be wrong, but I don't think it has anything to do with the
>>camshaft cover....
>
>This one is to balance the vacuum takeoff for the brake booster at the rear
>of the manifold. 

A bit late joining in, but: That is not the case on mine which is the stock
"Euro" Dellorto setup. From memory, the smaller diameter pipe from #1 inlet
tract goes up to the cam cover, attaching at the same fitting as the large
diameter pipe. The fitting on the cam cover has a large diameter outlet
facing rearwards for the main hose to the airbox, and a small diameter pipe
facing towards the RH side of the car for the small hose. I always assumed
that it was an oil drain from the breather.

Regards,

Mark.

Mark Battley
Auckland, New Zealand.

1973 Alfa Romeo 2000 GT Veloce
1989 Fiat Uno Turbo 
1989 Fiat Croma
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