The Caterpillar C18 is a 18.13 L 6-cylinder air-to-air aftercooled engine rated at 1800 rpm. It powers generator sets from Caterpillar, including the XQ600. It holds 20.8 L (5.5 gal) of coolant.
| Coolant capacity | 20.8 L |
|---|---|
| Displacement | 18.13 L |
| Cylinders | 6 |
| Aspiration | Air-to-Air Aftercooled |
| Rated speed | 1800 rpm |
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.