Cadillac CTS 2008-2013 3.0L Engine Specifications

The 3.0L engine in the 2008-2013 Cadillac CTS is a V6 direct-injection engine. It produces 270 horsepower at 7000 rpm and 223 lb-ft of torque at 5700 rpm. The engine features a cast aluminum block and cylinder heads, dual overhead cams, and variable valve timing. It is compatible with regular unleaded gasoline and has a fuel capacity of approximately 18 gallons. Emissions are controlled by a three-way catalytic converter system, and the engine meets LEV2 emissions standards.

Recommended maintenance for the 3.0L engine includes oil changes every 5,000 to 7,500 miles using 5W-20 synthetic oil. The coolant should be replaced every 150,000 miles or as specified in the owner's manual. Transmission fluid should be checked every 30,000 miles and replaced as needed. Brake fluid and power steering fluid should be inspected every 45,000 miles. Spark plugs should be replaced at 100,000 miles, and the timing chain should be inspected every 60,000 miles. Regular tire rotations and inspections are also recommended.

Replacing parts on the 3.0L engine requires specialized tools and mechanical expertise. Start by disconnecting the battery and draining fluids as needed. For major repairs, such as replacing the engine or transmission, use a lift and follow proper safety protocols. Refer to the service manual for specific instructions and torque specifications. Always use OEM or high-quality aftermarket parts to ensure compatibility and performance. Consult a certified mechanic if you are not experienced with engine repairs.

Common issues with the 3.0L engine include reduced power, rough idling, or illuminated check engine lights. Start by scanning for trouble codes using an OBD-II scanner. Check for loose connections, vacuum leaks, or faulty sensors. If the engine is overheating, inspect the coolant system for leaks or blockages. For rough idling, check the spark plugs and ignition coils. If the issue persists, consult the service manual or a certified technician for further diagnosis and repair.

To optimize the performance of the 3.0L engine, ensure regular maintenance is performed as specified in the owner's manual. Use high-quality fuel and maintain proper tire pressure. Consider upgrading to a high-performance air filter or exhaust system for improved airflow. Spark plugs and ignition coils should be replaced at recommended intervals to maintain optimal combustion efficiency. For enhanced performance, consult with a tuner or performance specialist to explore engine tuning options.