Detroit 60 series 12.7 big block

@sawmill is in Wyoming and a capable mechanic - if you have issues finding a good independent shop nearby.

Ignore the snobs - good on you for wanting to learn - and thanks to those helping him do so.

 

I was always under the impression that 14+ liters were big block.

 

While I dont reference them this, Detroit actually did.


That's my book, my phone, my big greasy thumb.

 

Detroit Diesel 60 Series Model Identification Chart

 

12.7 has always been considered big block compared to L10 and M11 as well as 3106 and C12. My joke was that unlike the Cummins and Cat engines, the smaller displacement Detroit is not a smaller engine. They, 12.7, 11.1 and 14 all share the same block. Yes, I know, the bore and stroke is different, and be cause of that the 14l is not exactly the same, but for all intents and purposes, the external dimensions are the same.

You could not fit either 11.1 or 12.7 in a short bbc truck, and that is big block vs. small block.