Quote:
Originally Posted by Jack E/NJ
bbrocksr>>>Positive crankcase ventilation uses manifold vacuum to pull the gases into the intake manifold, not through the carburetor.>>>
There are two types of PCV. The first is on the low vacuum side of the carb into the air cleaner that works mainly at high throttle when blowby is greatest and usually doesn't include a PCV valve. The other is on the high or manifold vacuum side of the carb that works mainly at low throttle and includes a PCV valve that closes at high throttle. Most vehicles in the 60s and later had both types of PCV systems.
Jack E/NJ
|
Jack, Not True, The PCV valve is hooked to manifold vacuum to suck the gases out of the crankcase and fresh,filtered air enters the crankcase through the line from the air cleaner. A PVC valve does not close in the direction of the vacuum, It meters the gases in that direction. It closes in the opposite direction to prevent a backfire from entering the crankcase.
Check the airflow on Ronnies post.
Bill