I don't remember my 70 1600 having a PCV valve. It was built in the
last month of production too. As far as I know, the OEM hose went
straight from the valve cover to the air cleaner. But my car may have
been wrong all this time, too.
-Marc
On Wednesday, June 18, 2003, at 02:39 PM, bob_wilson@agilent.com wrote:
> How important is a PCV valve? When rebuilding my '70 1600, I removed
> the vacuum controlled thing (was that a PCV valve) and did not put it
> back. Instead I simply vented the port on the valve cover through a
> hose which hangs down next to the engine and is open to the air under
> the car.
>
> I do see smoke (gas or oil, I'm not sure) periodically coming out of
> the exhaust pipe when using the engine to slow the car on steep
> downhill grades. Could this have anything to do with the (lack of) PCV
> valve?
>
>
> Bob Wilson
> 1970 Datsun 1600 Roadster
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