backwards PCV setup, is that okay?

brooklyn · #1 (**permalink**) 11-05-2009, 11:26 PM

'78 F150, 351M. As part of an emergency repair, I reversed my PCV setup, so the valve is on the passenger side rear, running into a port on the carb; and there's a breather on the driver's side front, pulling air from a hose running down from the cleaner (I reversed the lower dish thing).

It's running great at the moment, any reason I can't leave it like this for a while? Need to pick up new hoses and would rather wait 'til payday.

Only got to wondering because the (non-stock) valve cover baffles seem like they might be different on one side than the other, and I read something confusing somewhere online about how the layout had something to do with the frequency of left hand turns.

johnboy427 · #2 (**permalink**) 11-06-2009, 03:03 AM

Its fine this way this is the way most of them came stock in the 60s. I'm not sure why but they switched to a filter in the air filter housing instead of a filtered breather cap (probably to catch hydrocarbons escaping the crank case). You will want to get a breather with a filter in it (looks like a sponge) if you don't already have one.
-Johnboy

brooklyn · #3 (**permalink**) 11-06-2009, 04:42 AM

thanks for the feedback! the current breather has a filter element as described, i thought it was just to keep potential splatter/blowby from gunking up the air filter.

i just had a moment while i was swapping the gaskets where i started to wonder if there was a reason i've never seen the pcv valve up and to the left. it is a little awkward to route the breather hose past the spark plug wires, but not really a big deal.

i just need it to last another 7 days.