In addition to dual turbochargers you see stacked in series, this C13 ACERT engine (like the C11) receives a new cross-flow head, larger oil sump, higher compression ratio, and rotating components ...
A settlement has been reached in the class-action lawsuit that alleged Caterpillar’s 2007-2010 year model ACERT C13 and C15 engines were defective, driving up costs for owners and driving down resale ...