Buick LaCrosse 2017-2019 3.6L Engine Specifications

The 3.6L engine in the 2017-2019 Buick LaCrosse is a naturally aspirated V6 engine producing 310 horsepower at 6,800 RPM and 268 lb-ft of torque at 5,300 RPM. It features direct fuel injection, dual overhead cams, and variable valve timing. The engine is paired with an 8-speed automatic transmission and is compatible with both front-wheel drive and all-wheel drive configurations. It meets EPA ratings of up to 21 MPG city and 30 MPG highway, depending on the drivetrain.

Regular maintenance for the 3.6L engine includes oil changes every 5,000 to 7,500 miles using 0W-20 synthetic oil, tire rotations every 7,500 miles, and spark plug replacement every 97,500 miles. The engine air filter should be replaced every 15,000 to 30,000 miles, and the coolant should be changed every 50,000 miles. It is also recommended to inspect belts and hoses at 50,000-mile intervals and replace them as needed.

When replacing engine components, ensure the vehicle is on level ground and apply the parking brake. Disconnect the battery to prevent accidental start-ups. Use proper tools to avoid damage to components. For major repairs, such as replacing the engine block or cylinder head, refer to the service manual for specific torque specifications and procedures. Always follow proper safety protocols and consider consulting a certified mechanic for complex replacements.

Common issues include rough idling, decreased performance, or illuminated check engine lights. Use an OBD-II scanner to retrieve error codes for specific diagnostics. Check fuel system components, spark plugs, and ignition coils for wear or damage. Inspect the air filter and mass airflow sensor for cleanliness. If issues persist, consult a professional mechanic or refer to the service manual for detailed troubleshooting steps.

To optimize performance, ensure regular maintenance is up to date, including fresh synthetic oil and clean air filters. Consider upgrading to high-performance air filters or aftermarket tuning for improved throttle response. Avoid extreme temperatures and ensure proper cooling system function. Always use high-octane fuel as recommended by the manufacturer. For enhanced performance, consult with a certified tuner or mechanic for engine modifications.