Cadillac ATS 2013-2019 2.5L Engine Specifications

The 2.5L engine in the 2013-2019 Cadillac ATS is a naturally aspirated inline-4 cylinder engine. It produces 202 horsepower at 6300 RPM and 191 lb-ft of torque at 4400 RPM. The engine features direct fuel injection, dual overhead camshafts, and variable valve timing. It is paired with a 6-speed automatic or manual transmission and is compatible with both front-wheel drive and all-wheel drive configurations. The engine has a displacement of 150 CID (2.5L) and a compression ratio of 11.3:1. It is designed to run on regular unleaded gasoline.

Regular maintenance for the 2.5L engine includes oil changes every 5,000 to 7,500 miles using 0W-20 synthetic oil. Tire rotations should be performed every 7,500 miles, and brake fluid should be replaced every 30,000 miles. The engine air filter should be replaced every 15,000 miles, and the spark plugs should be replaced every 60,000 miles. It is also recommended to inspect belts and hoses at 50,000 miles and replace them as needed. Follow the maintenance schedule outlined in the owner's manual or consult a certified Cadillac technician for specific recommendations.

To install or replace parts on the 2.5L engine, start by consulting the service manual for specific instructions. Ensure the vehicle is on level ground and apply the parking brake. Disconnect the negative battery terminal to prevent electrical shorts. For major repairs, drain the coolant and disconnect the fuel line. Remove the necessary components such as the air intake duct, serpentine belt, and engine sensors. Use specialized tools to remove bolts and fasteners. Properly label and store removed parts. Reassemble in the reverse order of disassembly, ensuring all connections are secure. Refer to a certified technician if the repair is complex.

To troubleshoot common issues with the 2.5L engine, start by checking the dashboard warning lights and reviewing the fault codes using an OBD-II scanner. Common issues include rough idling, reduced power, or misfires. Inspect the spark plugs for fouling and check the fuel injectors for clogging. Verify the proper function of the mass airflow sensor and oxygen sensors. Check for vacuum leaks and ensure the fuel cap is sealing properly. If issues persist, consult a certified technician for advanced diagnostics and repairs.

To optimize the performance of the 2.5L engine, ensure regular maintenance is performed, including tune-ups and oil changes. Install a high-performance air filter and consider upgrading to a performance exhaust system. Use high-octane fuel for better combustion efficiency. Avoid extreme temperatures and ensure proper cooling system function. For enhanced performance, consider aftermarket modifications such as a cold air intake or engine tuning software. However, consult a specialist to ensure modifications comply with emissions standards and do not void the warranty.