i bought a used 5.9 over 1 yr ago and now got the chance to tear it apart to re gasket it and check bearings and found the rod bearings have wear but the truck had 240,000 miles on it ! I need to know if they are standard ? Number on them are DA-49 ! Mains looked good but might replace them while i am there !

 

With that many miles on it, I would just replace them.

Mic out the rod journals, that should tell you what size bearings you need.

 

Thats the plan but i need to know if they are standard ?

 

That's why you measure the journals, and see what size they are.

 

So what is the rod journal suppose to be ? I need a size to compare to /

 

2.125 for a 5.9.

 

so for 240,000 miles is it normal for the upper rod bearings to wear to copper ?

 

Yes. That's normal. The babbit is only a few thousandths thick.