Fail mode?

[tim2542]

This is an east coast friend and me on the west coast so I?m just looking at pics also. But to answer a few questions the crank was yellow tagged but don?t know if it?s std or not.
Further info now the bearing tang slots in the case are worn and the bearing has moved longitudinally enough to almost completely cover the oil port, yet it doesn?t look like oil starvation. The bearing can?t move if the case is torqued up proper and the case is machined correctly. So everything will go in for yellow tag and reassemble with new bearings etc.
Thanks! Tim

[TAB]

Rebuilder did not completely remove the cosmoline from new bearings, resulting in high initial friction and heat? Rebuilder used old surplus bearings that had surface corrosion? Dirty/plugged journal feed to this bearing at overhaul? Failed to apply overhaul (thick) lubricate to this bearing at overhaul? Installed a 0.003" over bearing in a standard journal? Moisture and acid damage will generally be prevalent throughout, very noticeable in valve covers as rust and green slime....your block looks clean, free of moisture and acid. Good luck!

[EXflyer]

Don't know where you have seen cosmoline on bearings they come with nothing on them. Various things can be used to coat them before installing the crank or cam. Some use oil or bearing lube not wheel bearing type of grease. If the bearing had been hot it is not showing that along with the face it would be moving metal off of the bearing onto the crank. Its corrosion nothing more. And when installing bearings you never touch the surface with your bare skin as that will cause problems due to the acid and moisture on your fingers. After installing hundreds of bearings over my life of doing engine work have again never seen a bearing coated with anything had I it would have been in the garbage.

[longline]

has not identified the make of bearing. To cut the story short: Fresno Airparts had bearings made, who knows where, and sold them as "new old stock" for Continentals. This is the failure mode that those bearings suffered from.

If it was caused by contaminated oil then all of the bearings would probably have suffered the same. OP said they did not suffer the same.

Another clue is the bearing tab not allowing the bearing to sit in the proper position in the case.

OP stated that this was a field overhaul. If cost was a factor, the Fresno bearings were half the cost of OEM.

I would bet a great deal that this is not a Continental bearing.