Ciclonvnz

I am rebuilding my engine with everything new, when unpacking my set of ACL Race main bearings I find these scratches on the shell that goes on the side of the block (shown below), the ones on the other side look perfect, this is normal for those bearings ?

LeoNA

They appeared to have been installed and measured.

Ciclonvnz

They were measured to rectify the crankshaft and in the machine shop they left them assembled together with the crankshaft for delivery, I received it a few weeks ago and today when it was disassembled to start the construction I saw that and it seemed strange to me, I don't know if they are marked like that ( the ones below) from the factory or the crankshaft when they rotated it for delivery it did and it is normal, it worries me because I don't know whether to leave it or buy others

curly

iTrader: (25)

Small scratches are ok, especially on new bearings. There's a coating on them that gets wiped off fairly quickly. If they're not deep enough to catch a finger nail on, I wouldn't be worried. Machine shops can be dirty places, so make sure you clean everything extremely well before assembling with lube.

SimBa

I got similar scratching on mine when I was using T gauges to measure clearances. Some of those seem a bit more scratched than what I saw, but I don't think it's anything to be concerned about.