Just so you know: the oil trap is just a hollow box, there are no diaphragms of any kind inside it. Of all the parts in the PCV system, the oil trap is the one where alternate brands are most obviously, totally fine. Be careful about what information from this mechanic you trust. As rspi said, you should probably get compression numbers yourself.ShaverNS1 wrote:... Looked it up to make sure after mechanic said the alternate brand oil traps have a weak diaphragm that often fails quickly....
If the glove inflates, the crankcase pressure is not acceptable.






