bearing wear question??

[dirtsdsm]

i built a motor and had an issue with water getting in the oil.. well it ran for maybe 30 to 45 minutes. as soon as in saw oil pressure dropping to around 14psi at idle i shut off the motor and never ran it again. i finally tore the motor down. and i saw the bearing like this what do you guys think for only being ran for a short time..

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[combs-dsm]

To me it looks like the bearing wasnt getting lubricated properly. When you built the engine the 1st time did you have the crank turned? Or polished? Im assuming the bearing is from the crank. If so then check out your crank visually and see if theres any weird markes, scratchs, etc on the journals.
But all in all, i wouldnt reuse the bearing if it was me. There not to exspensive, and well worth haven the peice of mind to know that you have brand new bearing, nothing that can be a potential rist for the newly rebuild engine.

 

[Cdc1221]

Definitely looks like a lube issue. I'll take a stab and say, did you not clean the crank properly?

 

[dirtsdsm]

The crankshaft was a brand new eagle forged crankshaft fresh out of the bad and box . I used lubraplate assembly lube when it was assembled.. and primed the oil pump before starting

 

[combs-dsm]

even new eagle cranks out of the box need to be polished before installation.

 

[BogusSVO]

That looks more like trash in the oil.

Even a brand new crank out the bag and box needs to be cleaned.

 

[dirtsdsm]

before i put it in i used a product call bonafide its a really good solvent to clean off the journals and bearings . then assembled it using lubraplate assembly lube..

 

[combs-dsm]

If it was from dirt or debris in the oil it could have been inside an oil hole or anywere else in the engine.

 

[dirtsdsm]

Supposedly the block was tanked and cleaned after machining..

 

[herms99gst]

Did you check the oil clearances for the main and rod journals before you assembled the motor?

 

[combs-dsm]

If everything was clean as well as you say then my bet is the crank prob needed polished before assembling or something was wrong with the crank from the start.

 

[WES_393]

That definitely looks like trash in the oil and/or dirty assembly. Did you have the head and oil pump cleaned as well?

At the very least, I would take the crank to a machinist and have it inspected, cut/polished, and thoroughly cleaned to include pulling the plugs and scrubbing the galleys. It would be best to have the same done to everything else, but if not then I would flush the oil as best as possible and hope the oil filter caught the debris. For assembly, I would suggest picking up a brand new tube of Moly-Graphite assembly lube and some Nitrile gloves.

And FYI- Stock oil pressure is ~12psi at idle.

 

[black97spyder]

Definately looks like a lubrication issue to me, crap In the oil would be possible but with the amount of time u ran it, it would not make a bearing look that bad in just the first 30 mins of break-in. It would take longer than that.

 

[dirtsdsm]

the crankshaft will be taken to a machine shop to be polished.. as for the block .. it has odd damage .. and will not be used again i have another block at the machine shop now getting tanked and checked.