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 clear from the rest of this post that you are not a mechanic.


>
> 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.

And on from which automotive expert are you getting this information.


>
> 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?

The guidance is...NO!