@j91z28d1 Recently another member installed a standard valley cover on top of AFM lifters and cam. It is unclear if the members motor had AFM turned on in the programming but after he installed the standard valley cover he has problems with his AFM lifters and it is suspected this happened because the AFM oil ports were blocked off.
I think the consensus after that situation was that if you are running AFM lifters it is best to not modify the AFM oil delivery system.
I remember it, it was an interesting thread but I feel like he missed a chance to improve the delete long term. the theory is that since oil pressure disengages the lifters, and they stick down. the vlom solenoid vent the oil pressure backinh up thru the port when they are off, then send oil pressure when on to release. so when he put the non vlom top on it, he blocked off the venting, oil pressure builds up and lifter released, probably all 8 but only 1 got stuck.
again in theory, the vlom vent can get clogged up with slug and stuff over time, so since it's turned off anyways, you clip the gasket giving the oil a way to bypass and then you're not relying on the vlom. and since the solenoids can fail and leak on the pressure side as well, you also block off the oil going to them. at that point you've removed everything except the pins in the lifter that keep them from collapsing. if the pins hold and the lifter tray holds up, it again in theory will be as reliable as a non afm lifter, just a bit heavier.
was just thinking since he's got so many miles, has had to unstick a lifter twice, something is releasing the lifter pins, and that once releases they stayed good for a while means to me the pins are in good shape still. be a good candidate to test.
just my thoughts on it.
