Always good to see a tech on here.
Your knowledge of this subject is much more than the average joe and you deal in tech terms on the daily, but to the rest of the world the colloquial for the solenoid is actuator in this case. The generic OBD code detail lists actuator circuit, so it’s easy to see why it came to be known as such. Do a google search for cobalt vvt actuator and see what turns up. It’s not the sprocket, which GM calls cam phasers on their parts lists.
I deal with the same issues in IT. It helps to keep in mind that clients don’t deal with with this stuff on a regular basis so their vocabulary is limited. It’s literally like speaking a different language at times.
I asked about the timing chain as if it is loose, he may as well pull valve cover to inspect it and the guides, and check the condition of the oil galleries and passages. Do you think that is reasonable?
OP is MIA anyway so our convo is pretty much academic at this point.
As a tech, have you ever taken apart an ecotec phaser from a sludged engine? I am curious to see if the sludge actually makes it in to the intervals of the phaser and causes it to always stay slightly advanced.
2010 LT 2.2 4 door