The latter, although many common sintering alloys simply couldn't meet the requirements to be an engine block. The crystalline structure caused by the unique th

The latter, although many common sintering alloys simply couldn't meet the requirements to be an engine block. The crystalline structure caused by the unique thermal process of sintering creates a far less stable structure, especially against thermal stress, which is less than ideal for a combustion engine. In my original comment, I meant to say forging. You could sinter and then forge, which could work.