The Caterpillar C6.6 Diesel Engine is a 6.6-liter, inline-6 diesel engine produced by Caterpillar Inc. It is a four-stroke, turbocharged, and intercooled engine that meets EPA Tier 4 Final and EU Stage IV emission standards. The C6.6 is available in a variety of configurations, including on-highway, off-highway, and marine applications.

The C6.6 has a bore of 102 mm (4.02 in) and a stroke of 127 mm (5.00 in). It has a compression ratio of 17.5:1 and produces a maximum output of 230 hp (172 kW) at 2,200 rpm and 660 lb-ft (895 N⋅m) of torque at 1,400 rpm.

The C6.6 is equipped with a number of features that improve its performance and efficiency. These features include:

• A turbocharger that increases air intake and boost pressure, resulting in improved power and torque.
• An intercooler that cools the air intake, resulting in increased power and efficiency.
• A common rail fuel system that provides precise control of fuel injection, resulting in improved fuel economy and emissions.
• A variable geometry turbocharger (VGT) that optimizes air flow and boost pressure, resulting in improved performance and efficiency.
• A diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF) that reduce emissions.

The C6.6 is a reliable and efficient engine that is ideal for a variety of applications. It is a popular choice for on-highway trucks, buses, and construction equipment. It is also used in a variety of marine applications, including fishing boats, work boats, and pleasure craft.

Complete spare parts manual for Caterpillar 6.6 Diesel Engine