You probably want to add a baffle so the valve won't draw oil. X2 My 351W blew oil all over with strait vent caps and used oil but works fine and uses no oil with stock style vent system.
Deuce Daddy Don , Sep 5, 2011. Jan 1, 2015.
Could be a clogged line or pickup in the tank, or a leak in the line, or some other weird problem making it not get fuel. Some also show the modern metric scale of kilopascals kPa. Low compression, an intake leak or tight valves also can cause low vacuum at idle. You really restricted the engine with those heads and intake and cam.
Having a slight vacuum makes it harder for bubbles to form. There is also a hose with a screw fitting at one end that I'm chasing down. You must log in or sign up to reply here.
The vapor was then redirected in to the base of the carb, however there was problems of severe back firing, hence the one way valve was developed to prevent the back firing and they gave it a fancy name, Positive Crank Case Ventilation. The PCV valve itself is the check valve for the vacuum leak.
You might have the exhaust crossover rotted thru in the intake. The positive crankcase ventilation PCV system siphons these vapors from the crankcase and routes them into the intake manifold so they can be reburned in the engine.
Aug 10, 2011 Posts: The 64 V8 with 2-bbl carb apparently took a different PCV. They had an interesting breather on powerblock tv a couple weeks ago, that was red in color, had a relief valve built inside, and installed on Keith Dorton engines.
The cranking vacuum test also can provide a quick test for PCV restrictions. Your name or email address: Some even only had round breathers on the valve covers, or on the oil fill tube.