Post by
float_6969 »
https://forums.nicoclub.com/float-6969-u780.html
Thu Apr 02, 2015 4:43 am
Yea, unfortunately, they tend to leak oil there...everywhere really, LOL. I think it's a lot to do with the PCV system. My last engine rebuild was the first time I was able to get the engine to stop leaking from all of the seals and it was the first engine that didn't blow the dipstick out. I had the 90°fitting behind the oil filter routed in full size hose up to nothing at first and it worked well at relieving pressure (I got NOTHING out of the valve cover ports), but it sprayed oil everywhere. So I tried stuffing some plastic scrubbers down the tube, but that didn't really help. Once they got saturated, it did the same thing. So I put an SR20 AOS on it and that stopped the oil from spraying everywhere, but then air started to come out of the valve covers. I just left it all open to the atmosphere eventually and it all seemed to work OK and none of the oil seals seemed to leak, but I only ended up with a couple hundred miles on that motor before I discovered the broken spark plug and damaged cylinder wall.
This go around I'm going to build a custom exhaust venturi and feed the crankcase vent straight to a suction created from the exhaust.