Hey guys gotta question. I'm freshening my 406 to help solve many issues. Last summer I installed an oil pan I had powder coated. The power coater used glass beads to prep the pan for powder. Well some of that crap was hiding in the crevasses and went through the motor. I ended up having the machine shop polish the crank. The main & rod bearings weren't in good shape. Machine shop said I was very lucky not to destroy my motor. The cam and cam bearings look perfect, not a mark on them. So, the six million dollar question, should I somehow flush the roller lifters, or since the upper part of the motor didn't show any signs of damage, would they be fine. I can't take them apart, due to the link bar rivet doesn't allow the cup to be removed. Another option, damn up the valley and prime the oil system and pull the motor through a couple revs and retrieve the spent oil? Another, fire it and immediately after change oil and filter. Maybe even do it a couple times?

Keith