OK - after 130K miles, I'd like to change the PCV valve and clean the area. However - it's a **really** tight fit right under the intake manifold (and I wear XL gloves). I can't even get some pliers in there to do a hose pinch test. Is there any way to get to it short of removing a whole bunch of other stuff? I've been running some Techron Concentrate in the tank. Will this have any effect if the PCV valve is clogged?