Expert: Skip Bollinger - 5/20/2009

Question
why does my 1988 honda accord lXI have extra oil coming from crankcase pressure. I have replaced PCv valve rerouted oil pressure lines with extra PCv valve. chambers are in normal range for pressure check enginge is sound and still powerful. 1988 honda accord LXI. Is other more than one PCV valve or a place where the oil flow can get plugged. Thank you for your time

Martin in Marysvillve Washington

Answer
Martin,
  Sorry to take so long to respond but I have a lot of personal issues going on right now. Now to your question....
  As noted in my Profile, I'm a Parts Professional, NOT a Tech but will offer these thoughts for your consideration.
  You need to understand how a PCV system works. Inside the air cleaner (at least on older cars), there is a PCV air filter. It is in the air cleaner and has a hose running from it to the valve cover. The way the system works is fresh air is sucked through this filter into the crankcase. The filtered air goes through the crankcase, into the PCV valve, through a hose, into a port in the base of the carburetor/fuel injection or intake manifold. Manifold vacuum pulls the air through the filter, into the crankcase, through the PCV valve, up the hose and into the intake system.
  Now..... IF oil is getting into the air filter area, something in the PCV system must be plugged and letting the oil be sucked out of the crankcase into the air cleaner through the filter, an area that has vacuum also (but not as much as the intake manifold). With that being said, I would do the following:
  Replace the PCV valve which I think you have done.
  Replace the hose from the PCV valve to the carburetor/fuel injection/intake manifold.
  Where the hose connects to the carburetor/fuel injection/intake manifold, insert a small screw driver to make sure the port isn't plugged up with carbon. IF it is, you need clean it out. Slowly, I'd take a drill bit and begin drilling out the carbon. By the slope of the cutting edge on the drill bit, it should bring most of the debris out of the port. Use a vacuum cleaner if you need to.
   I'm not sure how you rate time but this could take 2-3 beers or maybe an hour and a half. Just take your time and work slowly. What you DON'T want to happen is shoving a bunch of carbon into the intake manifold. I won't go into why.
  That is about all I have to offer. I hope it solves your problem. Martin, please remember, I'm a Parts Professional, NOT a Tech so if this isn't the problem, don't hammer my chops too hard. Good luck and have a safe and happy Holiday weekend.
Skip