I did mechanical work for a buy here pay here car lot. There is nobody cheaper than them. When I encountered a sludged up motor, I would put hydroseal carburetor cleaner in the oil pan thru the dip stick about 3 qts. Let it sit for 2-3 days and flush it with kerosene. Worked like a charm.
That's a good idea. As soon as I drop the oil i can look up inside with a boroscope. I wonder if I could pull the distributor and gear and run the oil pump in reverse to dislodge the pieces from the pickup screen. Just thinking out of the box here.
