Blue Bird Engine Rebuild Question........

[cmlintx@...]

I have noticed that several of the 'For Sale' older Blue Birds (1990's) are
advertised as having their engines rebuilt when the mileage is only around
100,000 to 150,000 miles. Is this because the owners did not know how to take
care of the diesel and they did something wrong? What do I, as a want-to-be
owner, check to verify that an engine has been cared for properly?

Thank You,
Clyde in Festus
Want-to-be Motorhomer