My PCV is still springless. However, while searching for 'something else'
in my junk box, I happened upon a spring that looked like it might fit, so
... even though I believed it to be too firm, I had to try it.
The RPM went up by about 700 rpm and I thought that maybe I had better take
the thing out. So I took the top clip off and the top metal piece that I
was expecting to fly off due to the heavy compressed spring ... didn't.
(car still running.)
So, all this to ask how the PCV really works.
Here are my thoughts:
The intake sucks from the bottom and the front hose provides pressure from
the crankcase. The intake would be pulling down on the diaphram and the
crankcase pressure would be pushing up on the diaphram. The stronger
pressure wins (with the right spring and a good diaphram, etc. ) and the
result is that the plunger moves up or down and the opening that allows air
to pass through the PCV increases when the pressure is greater than the
vacuum.
How did I do?
Now, why the jump in RPM in my example?
Robert Duquette
Ottawa ON Canada
http://www3.sympatico.ca/robertduquette
RobertDuquette@Sympatico.ca
'65 RHD BRG Sprite
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