|
|
Posted by The Dodge Boys [64.121.152.7] on Friday, July 27, 2012 at 22:25:35 :
In Reply to: What's the spring in a PCV valve for? posted by Sherman in Idaho [72.47.153.24] on Friday, July 27, 2012 at 21:49:49 :
Every PCV valve is calibrated to flow a certain amount of air as per engine design. It allows the engine to breath and not build up pressure inside the block. {it would start to push oil out if it gets plugged] The spring and piston inside open and close as needed during engine operation. It only controls engine blow by and keeps it inside to be re burned,not to allow it to escape to outside air like the road draft tube did. Years ago I remember cleaning out many blocked PCV systems on Ford engines. They were the worst. Then came EGR valves, then they block up with junk. Hope that helps. Also years back when they first came out with fuel injection if you installed a wrong or cheap PCV valve in a engine you would get a high idle. I always kept factory PCV valves in stock for my customers Cars. Ford Valves were plastic, GM plastic and steel, Mopar plastic or all steel. Now you know the rest of the story. The Dodge Boys.
Follow Ups: