AOS Failure: what breaks first?

[maytag]

So, help?
What should be plugging this? (This is the front end of the left side intake cam.) And what would cause it to go missing?

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[krombacher]

Originally Posted by maytag

So, help?
What should be plugging this? (This is the front end of the left side intake cam.) And what would cause it to go missing?
Sent from my SM-G930T using Tapatalk

Significant (air) pressure built up in the crankcase somehow, and popped them out. It May have happened when the AOS was temporarily full of oil during your track spin. The AOS is supposed to create a vacuum in the crankcase using the vacuum available from the intake manifold. If for reason it couldn’t do that momentarily, blowby gasses May build up enough to pressurize the crankcase.

Put the cam plugs back in, and if your missing a cam plug, it’s probably at the track somewhere..

Once all of the cam plugs are back in, in theory you shouldn’t have any more big air leaks into the crankcase. Once you put in the new AOS, the car should run better (probably runs rough right now because it’s sucking way more crankcase air than it should due to:

1) the diaphram in the AOS is probably punctured or ripped, which means it won’t be able to regulate the vacuuum it’s supposed to maintain in the crankcase. The diaphram uses differential air pressure (vacuums, in this case), to function, and with a punctured diaphram, the diaphram will leak pressure to the other side.
2) cam plugs not being in - which will leak lots of air into the crankcase, just like opening the oil cap when the car is running, it will make the engine run poorly.. the AOS’s regulator would open up as much as it can to try to achieve a low vacuum level inside the crankcase, but it won’t be able to achieve it - because too much air is leaking into the engine from the hole (cam plug missing or not seated, or if the oil cap is off). With the regulator fully open, a very large amount of air will be flowing from the crankcase, through the AOS, and into the intake manifold. It enters the engine after the mass air flow sensor, so the engine won’t know about how large the vacuum leak is. It would try to adjust using feedback from o2 sensors (but only once they are fully warmed up), otherwise they’ll be ignored when the engine is cold, and the computer will have no idea it’s sucking in way too much air for the amount of fuel it knows it should have to put in.