Are you still connecting the cap to the air cleaner? Is it purely emissions control? I’m searching for a black twist on without the 90 for the hose. Strictly an appearance thing. Thx
If you are using a PCV valve, then you need to draw filtered air from the air cleaner .
Thx. I don’t quite understand.
One valve cover has a PCV valve hooked up to the front of the carburetor, which uses vacuum to suck air through the PCV valve.
The driver side valve cover has an oil breather cap. This was originally connected to the outside of the stock air cleaner, which I haven’t used for years.
I have noticed the new air cleaners have knock outs for a hose connection to the breather cap, and the knockouts are on the filtered air side.
But neither system, to my knowledge draws air from the filtered side of the cleaner.
I guess the main question is - is the breather cap to cleaner hose just for environmental considerations, or is there a performance issue as well?
Engine bay looks better without all the extra plumbing.
Simple,
If you don’t connect the drivers side air vent you will cover the rocker covers with the oil film from the blow-by from the engine.
Theres a lot of crank case pressure going on in there, especially an older engine.
The PCV valve is suposed to take care of this but doesn’t really.
Fit the hose to the air cleaner base were ever you can.
PCV means positive crankcase ventilation. Filtered air in from air cleaner goes through the breather cap, then out through the PCV valve into the intake under vacuum.
The breather cap serves as a vent when the engine is not running
Thx everybody. I will hook it back up.