Dipstick vs Block venting
#16
pushed out by what then? Im not sure what a dip stick vent is though so maybe im just not understanding what your actual problem is. I will say in troubleshooting you cannot rule something out unless you have specifically tested it and have a conclusive result from that test.
Out of curiosity....for those with oil pressure issues, especially with your dipstick popping out, what max oil psi are you seeing? My DEFI gauges show peek at around 125 psi at the filter on my 2.3L, and I've never had that happen on this build, or even on my stock block.
#18
EvoM Community Team Leader
Sorry, my morning reading comprehension can be spotty. I looked up the 3-port STM catch can, and I understand what you are talking about now. The problem remains, why is oil getting pushed up your dip stick. I think under normal circumstances the head can vent enough crank pressure to cause no issues. Eventually though it seems common that people start blowing out their dip sticks. Its probably some function of boost vs ring sealing capability. Only a leak down test will show if your still in that healthy normal range of ring sealing though. In your specific instance, I think it could be a combination of acceleration and a decent G left turn. I think this might cause the oil to cover the bottom of the dip stick tube. Then add in some crank case pressure and the oil gets pushed up instead of just a popped dip stick, or in your case air venting through the 3-port catch can.
#19
EvoM Community Team Leader
Thanks to hydraulics it would actually take very little overall crank pressure to push oil up that small tube.
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