So the P0012 went away only just briefly after swapping out the VCT solenoid, however I did find when I did the s. olenoid, a considerable amount of sludge under the valve cover. The VCT system is known to be extra sensitive to oiling issues,
I am continuing to do some research on the issue, as I gather the resources (Money) to do the fix. I want to insure I am doing it right. The cam phasers aren't knocking, I hear what sounds like normal lifter sounds thats about it when it idles... So at this point I am thinking about...
#1. Pulling the valve covers, and dropping the oil pan. Giving the both, and the tops of the heads a thorough cleaning.
#2. Clean the oil passageway at the rear of the cylinder head that goes through the top of the block toward the back, insure that it is free of obstruction and sludge, basically insure the oil can get from the drivers side to the passenger side with sufficient pressure.
#3. Install new VCT Solenoids.
#4. Button up the oil pan, put on a decent oil filter, and oil the top end prior to reassembling the valve covers, and all that goes there such as COPs fuel rails etc...
#5. Fill the case with quality well oil, and a proper dose of Marvel Mystery Oil. Get it going again, and insure the code is cleared. Give it a couple hundred miles of run and then...
#6. Perform a full oil change keeping clean oil in it...
In discussion with several different mechanics, I am getting varied feedback on proper oil for this thing. Some say Ford got it right with recommending 5w30 for this engine even in the hot nasty environment of Texas, while others are telling me to run 20w50. The jury is still out on that. I want the oil thick enough to stay on the pieces it needs to be on and provide good pressure, without being so thick as to be too hard to pump... Oh boy do I have some fun choices to make!
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