MR18 Motor with connecting rod metals.

Tiida 2007 Motor
This car came to the workshop, I showed a lot of pressure on the aim lid, check the PCV and was working well, it was told to the client that the problem were rings and disarmed, metals were bought in STD. And it turns out that the metals when comparing them with those that the machine brings are thinner and narrower, this engine is a MR18 of I already went to the agency to compare the new Vielas with those used and they are the same, the original metals are the same as those that sell me in the refactionary, I do not understand why the metals that this engine brings they say they are in STD. And they are thicker and more wide than those who sell me, it seems that they would have adapted them, the bad thing is that they look very damaged and I do not know whether to place them or send them to do.
It seems that they would have rectified the crankshaft and left it in 30 but because the metals claim to be in standard.
There are left them as an antecedent in case someone happens to someone.