Truck is 92 cumming. sat for 4 yrs. Has been running for the last few months strong. oil light came on thought it was a sensor . drove it home 50 miles. ( dumb) change the sensor still no pressure change to a different gauge. got 2lbs out of it. took the sensor out started truck oil was heavy drizzle came out. pulled the filter and the housing started the truck for a few seconds no oil came out. so it seems like i ran the motor with no oil pressure for 50 miles. **** cut open the filter to look for metal. no-then. but there was in the oil in filter brass looking things. shave's) and metal. micro size... Could that be from pump or did i just cook my engine. please advise.. Howard

The bearings are at least shot, but the crank may be OK. :(

Just got done pulled the pump looks good. nothen in the pick up>> pulled the oil filter and the housing check the pressure valve it not stuck. anything else will stop the oil flow.. only metal micros is in the filter oil. the oil was clean when it was drained. no metal on the magnetic drain bolt...
would you still pull the motor and rebuildi t...

I wouldn't pull it just yet, I'd do an in-frame inspection. You said the shavings were copper/brass coloured, so there's petty much no doubt your bearings are toast. Unless you have a beaver in your engine who has a penchant for brass fittings/banjo bolts. [roll]
As Wannadiesel said, your crank might be fine. Better to find out if it is before you go and pull the block out, because if it's good you can roll new bearings in with it still in place. Bearings are consumable, they're there to protect the crank because the crank is the biggest, heaviest, most expensive, (single) chunk o' metal in your engine. As such, it's their job to wear as they did. Here's hoping they didn't weld themselves to the crank. Good luck Howardfire70, sorry you hurt your truck.

I did stop hopefully before the damage is done.. Motor still runs with missing a beet.. Im still puzzled why the oil lose. as I go in deeper . I'm sure it will revile. Thanks for the input. I'll let you know what I find. Thank you Howard

you must just have a blockage somewhere. but unfortunately it doesn't take long for the bearings to run dry and wear quickly. maybe try pulling the plugs from other ports in the main oil rifle and see if you have ample pressure there.

Does it have a FRAM filter? That might be your problem. No matter the ads in diesel magazines, FRAM is NOT an approved filter.

I run napa gold which is a wix...

can i do do rods and mains in the frame. with out pulling the motor?
I never built a diesel . Hade done plenty of chevy motors. I would attempt to to rods in main with a gas motor with out pulling it. but I hear from a lot of diesel guys that they do it in frame. but its in the big trucks...

What does your mechanical oil pressure gauge read?

I did not have a mec. gauge the factory went to 0 and the light came o change sensor still no- then. then aftermarket elec one and it was about 2 lbs.
then I pulled the sensor off left open hole in the motor started iy up took a few seconds and oil came out like a heavy drizzle. I would imagine it should have shot oil ever were. ???

thank you.....Kd93

You might pull the front cover and inspect the oil pump. Do the dowel pin while you're in there.

I did that the pump looks great.. Dowel pin is on the list while its apart. thanks

can i do do rods and mains in the frame. with out pulling the motor?
I never built a diesel . Hade done plenty of chevy motors. I would attempt to to rods in main with a gas motor with out pulling it. but I hear from a lot of diesel guys that they do it in frame. but its in the big trucks...

Absolutely, yes. I don't think you would need to do rods, unless you spun a bearing or two, [yuk]. Although while you're there I guess... Heck, you might as well call Mahle and replace the pistons too! [laugh] It's so much easier to spend other people's money. [laugh]

Dropped the pan pulled a main bearing look ok a little scuffed.
I am clue less why I lost my oil pressure I blew air there everything and it was fine.. Im trying to find some type of schematic of the motor to understand how the oil systems work. Does any body know were it can be found??? Please advise>> thanks Howard

Hope this helps, and sorry to hear about your luck :(

truck runs fine no oil anywhere under the truck. ive heard of blowing a hole in the piston and it blasting oil out the dipstick or out the vent. maybe someone drained your oil and put the plug back in? do you have any enemies?

I broke a key one time on a ntc big cam in the oil pump drive gear 0 oil pres. instantly,also the rod bearings will be worse than the mains,pull it down and check. With the oil pump key sheared you can't see it till you take the pump apart.

^^ that was my next guess is, maybe the gear is spinning on the shaft.