Short version: does the orientation of the PCV valve matter? They seem to
be installed within a few degrees of vertical in nearly all OEM
applications. I would like to mount one horizontally... will the valve
still operate correctly? Will any problems result?
Longer version: I have a modified Ford smallblock (302 block, 347
stroker) that has cast aluminum valve covers. The covers have no breather
or PCV holes, so I'm adding a breather to the left one and a PCV valve to
the right one - more or less factory configuration.
The covers are quite tall and there is plenty of room to put the PCV
valve port on the side of the cover, near the top. It will be well above
the valve gear and oil splash, baffled of course, and will actually be
higher from the head surface than a stock mounting would be.
I'm not 100% clear on the details of how PCV valves work, but it doesn't
seem to me that there would be much difference between "vertical and
being rattled around like hell by the engine" or "horizontal... [ditto]."
I am planning the setup around the stock valve used for a 1968 smallblock
- if there is another model intended to work horizontally, please let me
Answers and comments appreciated.
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