Whitelightning, The valve cover and the air breather share a line that runs from the hydrovac. I believe that this is a "return" line,not under vacuum,just atmospheric pressure. There's a valve somewhere in that line,that should be periodically cleaned,and maintained,but I can't seem to locate it. That may be the source of the problem. Brakes work great,though,so it's a little confusing,to say the least.Don,I still have 60# oil pressure,after a 1/2-hour idle.Engine temp. is normal. I got the gauge to register. If the bearing clearance(s) were off far enough to lose 2 quarts of oil,wouldn't the pressure drop significantly? At least,that's been my previous experience. I bought a vented oil cap,along with a PCV valve,which I'm planning on installing in the vac. line,from the draft tube,to the intake. The old cap is not vented. Hope this cures it. If it doesn't,I'll take Don's advice,and start the tests. I'll let you guys know the outcome on the PCV./vented cap. THANKS!!
Last edited by wetwilly5757; 09/27/2014 6:03 AM.
