Cadillac CTS 2003-2007 2.8L Engine Specifications

The 2.8L engine in the 2003-2007 Cadillac CTS is a V6 engine producing 210 horsepower at 6500 RPM and 195 lb-ft of torque at 4800 RPM. It features a cast aluminum block and cylinder heads, dual overhead cams, and variable valve timing. The engine is compatible with premium 91 octane fuel and has a displacement of 2.8 liters (171 cubic inches). It is paired with a 5-speed automatic transmission and is designed for optimal performance and efficiency in the CTS model line.

Regular maintenance for the 2.8L engine includes oil changes every 5,000 to 7,500 miles using synthetic 5W-30 oil, tire rotations every 7,500 miles, and spark plug replacements every 100,000 miles. The coolant should be flushed and replaced every 50,000 miles, and the brake fluid should be changed every 30,000 miles. Additionally, the air filter should be replaced every 15,000 to 30,000 miles, and the serpentine belt should be inspected and replaced as needed, typically around 50,000 to 90,000 miles.

To replace the air filter on the 2.8L engine, open the hood and locate the air filter housing on the driver's side. Release the clips or screws holding the housing in place, then pull it out. Remove the old air filter and inspect the housing for debris. Install the new air filter, ensuring it is properly seated and the housing is securely closed. Replace any clips or screws you removed, and close the hood. This process should take approximately 10-15 minutes and requires no special tools.

Common issues with the 2.8L engine include oil leaks from the valve cover gasket, coolant leaks from the water pump or hoses, and intermittent misfires due to faulty spark plugs or ignition coils. To troubleshoot, check for visible leaks, inspect the spark plugs for wear, and use an OBD-II scanner to identify error codes. Addressing these issues promptly can prevent more severe damage to the engine.

To optimize performance, ensure proper maintenance is up to date, including regular tune-ups and air filter replacements. Consider upgrading to a high-performance air filter and exhaust system for improved airflow. Additionally, using premium fuel and maintaining proper tire pressure can enhance fuel efficiency and overall engine performance. For more significant gains, consult a professional about engine tuning or performance modifications.