Crank & rod bearings wear

[splitfire]

Greetings.

Can someone advise me in regard to wearout of these bearings?

Common sight:
http://storage3.static.itmages.ru/i/15/0917/s_1442492082_9207257_d1baf6c73c.jpg (http://itmages.ru/image/view/3006129/d1baf6c7)

Bearings of 1-4 cylinders, left to right:
http://storage3.static.itmages.ru/i/15/0917/s_1442492082_9387198_94eb0eb948.jpg (http://itmages.ru/image/view/3006130/94eb0eb9) http://storage5.static.itmages.ru/i/15/0917/s_1442492091_2856749_2b0409d485.jpg (http://itmages.ru/image/view/3006133/2b0409d4) http://storage5.static.itmages.ru/i/15/0917/s_1442492091_8222540_ca54f10292.jpg (http://itmages.ru/image/view/3006132/ca54f102) http://storage6.static.itmages.ru/i/15/0917/s_1442492091_7699713_ae92f3fb5f.jpg (http://itmages.ru/image/view/3006134/ae92f3fb)


Why are there worn areas near the edges of bearings?


This scratch on the rod bearing of 4th cylinder can be felt by fingernail.
http://storage3.static.itmages.ru/i/15/0917/s_1442493282_6219916_4b9ae0ca08.jpg (http://itmages.ru/image/view/3006187/4b9ae0ca)


Can I leave these bearings or I should replace them?

[Croustibat]

I'd say worn more on the sides means crank walk, not enough oil pressure, and/or crank journals with uneven surface. Can't say much more tbh.