My engine had 394,000 miles on it. I didn't understand the EGR valve
and it had stuck open, making the engine extremely difficult to
start. I didn't know it at the time, but the head was cracked in 6
places, reducing compression. The lower end of the engine was
probably fine. The oil consumption was about a quart every 2000
miles, and the new engine consumes oil at approximately the same rate.
I think I got cheated a little bit on the rebuild because I was
supposed to get a new camshaft, but I think the same camshaft was
reused because some pitting that was present on the edge of the lobe
for the #1 cylinder exhaust valve appears to still be there.
But the engine runs great and has significantly more power than it did
before. A new head would probably had the same effect and saved me
$5000, but I am still glad I went with the remanufacture, especially
getting a new timing chain, injection pump and rebuilt turbo.