Vacuum Problems?

I have a 1985 Chevy S-10 With a new engine in it. I am having a problem with the vacuum system I believe, when the engine is running and I take off the oil filler cap, I feel air coming out and I believe it should be
sucking in. Anyone know how to fix this?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Sounds like a non-working PCV valve.
PCV is short for Positive Crankcase Ventilation. It should be located on top of a valve cover and have a thick vacuum hose running to the carb or manifold. It keeps the pressure from building up in the crankcase.
Even if the PCV valve is in place, it still needs to have the vacuum line connected in order to work properly.
~jp
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.