If the check engine light appears on the dashboard of a Cadillac or if a burning smell is coming from the hood, it can be an indication that the car is burning oil. This is caused by a variety of reasons, some of which include worn valves, sticky oil rings, weathered piston rings and a damaged ventilation system. A proper maintenance routine can ensure a car will not burn oil; however if it does it can easily be remedied.
Identify that the Cadillac is burning oil. Warning signs include the appearance of black smoke, a burning smell and a need to frequently top up the oil.
Drain existing oil from the car. Unscrew the oil drain plug from the bottom of the engine oil pan and allow the oil to drain into a pan. Remove the existing oil filter and replace it with a new one. The oil filter is located next to the oil pan on the bottom of the engine.
Locate the source of the burning oil. Assess the quality of all valves, oil rings, piston rings and the valve for the Positive Crankcase Ventilation (PCV) system, all located in the engine. If these parts are stretched, worn or cracked, oil will leak through and burn.
Remove and replace valve seals, oil rings, piston rings and the PCV valve if they are damaged. Remove existing seals and rings with a wrench or pliers if necessary. Wipe the area well with a clean rag and fit new seals, rings and the PCV valve.
Fill the Cadillac with the recommended amount of oil for the model; this will range from four to seven quarts. Add the oil slowly, one quart at a time. Use the oil dip stick to ensure enough oil was added.
Change the oil and oil filter every 3,000 to 5,000 miles and service the Cadillac once a year. This will ensure that the parts of the engine that are causing oil to leak and burn are identified and replaced before any damage can occur.
