Rod bearings replacement?

When you pull a couple of bearings,look at the date on the bearing shell.It will tell you if they've been replaced.If they are not that old,and look good,put them back in no sense throwing money away.If there has been poor maintenance,or dirt induced into the engine,you will see it in every bearing.If a couple look good,they're usually all good,if a couple look bad they're all bad.At 900k,if the motor hasn't been apart,you're not going to be that far away from an overhaul,just use common sense.
Does the op have any history on the engine?

 

I agree with heavyd. If you're going to the trouble of pulling the pan and the bearing caps you may as well do the bearings too.

 

well ya kinda have a good idea looking at oil pres gauge

 

I say don't waste your money on a bearing roll in with that motor. In the old days with mechanical engines and bearing material alloys/knowledge not on par with recent 15 years or so, yes, it was routine maintenance to roll in bearings.

Little lesson I learned a few years ago. My oil psi dropped down 5 psi from what it normally had been around 950,000 miles. Convinced a bearing roll in would fix that I had it done. My mechanic, an experienced one I know and trust, told me - your oil pressure is fine, well within spec.. roll bearings in if you must but I have to tell you it's a waste of money. I did it anyway.. And I would have been just as well off to light a match to that money. He showed me the old bearings and said they would have been fine for many more years of service.

So fast forward to 1,110,000 miles and a liner cracked or pinhole putting coolant into the oil. And so it had to be inframed. I wasted my money on an unnecessary new rods and mains job so you don't have...

 

Bearings in the bottom end on most all modern engines now a days are good for life of engine. Unless you got a big cam cummins or A/B model cat , completely waste $.
People do it for piece of mind then 2-3 hundred thou miles later engine needs an inframe anyway and you do them again.

 

If a engine is happy, why touch it? I have to ask that question.

 

a local shop told me that people come in all the time wanting bearing put in just cause so many miles, told me they don't need em, but we do what the customer wants