Have you checked that the crankshaft end-float is within spec ?
Just wondering if a failed crankshaft thrust bearing is the cause of your cylinder wall bottom wear e.g. crankshaft dropped down and putting downward pressure on con-rods and pistons.
Bob
I checked the end-float several months ago before I began any work on the motors. It made no sense to go forward if the thrust bearings were worn. They're good.
It turns out, the cyls are very round....all 6 well within spec. Surprisingly little wear?!!
There is a little pitting of the head, next to the valves on #6, which would indicate some water intrusion. No pitting in the cylinder, which seems strange.....but I'll take it. I don't know how there can be enough water to pit the head, but not the cylinder.
I will get the heads to the shop next week, and then we're going on vacation. So it will be awhile before I have results. It's possible the cost will go up, depending on if they have to replace valve seats, guides, valves, etc. But still.....it's worth a shot. A new short block is $3200 and way too many hours for me, especially since I don't have a shop to work in.
Yes, I'm rotating the pistons so that they all get the SF worked in. Interesting, today, 24hrs after the first fill, 3 or 4 of the cylinders were still full of SF. None had seeped by?! Does that mean heavy carbon? I assume that over several days they will all start to seep.