Cadillac ATS 2013-2019 3.6L Engine Specifications

The 3.6L engine in the 2013-2019 Cadillac ATS is a direct-injected V6 engine producing 321 horsepower at 6,800 rpm and 274 lb-ft of torque at 4,800 rpm. It features a dual-overhead cam design with variable valve timing, ensuring optimal performance and efficiency. The engine is paired with an 8-speed automatic transmission and is compatible with both rear-wheel and all-wheel drive configurations. The engine's displacement is 3,564 cc, with a compression ratio of 11.5:1, and it uses regular unleaded gasoline (87 octane).

Regular maintenance for the 3.6L engine includes oil changes every 5,000 to 7,500 miles using 0W-20 synthetic oil. The engine air filter should be replaced every 15,000 miles, and the spark plugs should be replaced at 100,000 miles. The coolant should be changed every 50,000 miles, and the timing belt should be inspected at 105,000 miles. It is also recommended to follow the GM-recommended maintenance schedule outlined in the owner's manual for optimal performance and longevity.

Before starting any installation or replacement, consult the service manual for specific instructions. Always disconnect the battery to ensure safety. For major repairs, such as replacing the timing belt or water pump, ensure the engine is cold. Use specialized tools like a torque wrench and follow GM-recommended torque specifications. Proper alignment and gasket sealing are critical. If unsure, consult a certified Cadillac technician to avoid engine damage.

Common issues include rough idling or reduced power, often due to faulty spark plugs or a malfunctioning oxygen sensor. Check the dashboard for error lights and use an OBD-II scanner to retrieve trouble codes. Low coolant levels or leaks can cause overheating, so inspect the cooling system regularly. If experiencing lack of power, check the fuel cap and intake system for vacuum leaks. Always refer to the service manual or consult a professional for accurate diagnosis and repair.

To optimize performance, ensure regular maintenance is up to date, including air filter and spark plug replacements. Use high-quality gasoline (91 octane for optimal performance, though 87 octane is acceptable). Avoid aggressive driving and maintain proper tire pressure. Consider upgrading to a high-performance air intake or exhaust system, but ensure any modifications comply with local regulations and do not void the warranty.