Jeff -
Unvented cap, definitely. Having a vented cap would defeat one purpose
of the PCV system, which is to keep the inside of the crankcase at a
touch less than atmospheric pressure.
Chris Kotting
ckotting@iwaynet.net
Jeff Boatright wrote:
>
> Spridgeteers,
>
> The 1275 in my Mk3 Sprite came with a vented oil filler cap and no
> PCV system (i.e., no tube from the front separator/breather on the
> timing chain cover, no valve sitting on top of the intake manifold).
> I've now added a cobbled PVC system and was wondering if I need to
> switch to a non-vented oil filler cap. That is, what did the 1275
> egnines with PVC valves connected to the middle of the intake
> manifold have: vented or unvented caps?
>
> TIA,
>
> Jeff
> Jeffrey H. Boatright, PhD
> Senior Editor, Molecular Vision
> http://www.molvis.org/molvis
> "Seeing the Future in a Very Tiny Way"
|