On Thu, 08 Jun 2006 16:00:04 GMT, "j" > wrote:

>I am not a mechanic, but this is in regards to a 1994 Chevrolet Corsica with
>a 6 cylinder engine that has 138,000 miles on it, is still in very good
>condition, and has always had Mobil 1 synthetic oil.
>
>It is my contention that the PCV valve, on an engine this old, is likely to
>decrease the engine life due to the fact that it is introducing contaminants
>into the intake and cumbustion chamber.
>
>In order to make my car last longer, I am thinking of permanently removing
>the PCV valve and replacing it with a homemade filter, but leaving the hose
>that the PCV valve is connected to unplugged all the time and hanging in the
>air with the homemade filter attached. In other words, I will unplug the PCV
>valve and throw it away, leave the hose hanging in the air, and where the
>PCV valve had formerly been attached to the hose there will be a filter
>(primarily to prevent bugs and dust from entering the engine).
>
>Where the PCV valve had formerly been plugged into the valve cover, I will
>place a homemade filter in the hole on the valve cover. This will allow to
>crankcase to ventilate, but there will be no longer be any sucking action. I
>remember as a child seeing "oil breather caps" on valve covers. I don't see
>any reason why this technique shouldn't work on a modern engine.
>
>However, not being a mechanic, I would rather have some qualified guidance
>from this newsgroup prior to pursuing this idea any further than the thought
>stage. I have already plugged my EGR valve port to prevent it from
>introducing contaminants into the engine and the engine seems to be idling
>smoother, so why not do the same with the PCV valve?
>

Aside from all the correct replies posted about the PCV valve...you
also need to fix your EGR system. The EGR valve is supposed to be
closed at idle...if your car idles better with it disconnected, it's
because your EGR was sticking open. You should replace it and clean
out the passages. Without an EGR, combustion temperatures are higher,
causing your engine to knock and ping under load, and eventually
you'll burn up your pistons.