The Barrington Diesel Club provides information on the Caterpillar 3116 engine, including engine specs and torque numbers. The site also makes available a Caterpillar spec sheet in PDF format for free.
The displacement on the Caterpillar 3116 is a 6.6 liter engine at 402 cubic inches. The engine is a six-cylinder, in-line turbo engine with a 16.0:1 compression ratio. The engine itself weighs approximately 1,500 pounds and is turbocharged and after-cooled.
For $47 per year, as of 2015, the Barrington Diesel Club also offers premium access to disassembly, operations and testing, and troubleshooting manuals. Individuals can also purchase a seven-day window to view and download all Caterpillar-only engine specs and manuals for $15.