1. Engine Specifications:
- Check the vehicle's owner's manual or specifications to see if the engine is listed as a DOHC engine.
- Research online or contact your local Ford dealership with your vehicle's VIN number to obtain detailed engine information.
2. Visual Inspection:
- Open the hood of your vehicle and locate the engine.
- Look at the cylinder head cover, which is usually located on top of the engine block.
- If there are two camshafts visible on the cylinder head cover, it's likely that the engine is DOHC.
3. Engine Sound:
- Start the engine and listen to its sound.
- DOHC engines tend to have a smoother, quieter sound compared to single overhead cam (SOHC) engines.
4. Engine Codes:
- Some vehicles use engine codes to identify specific engine configurations.
- Check under the hood or the vehicle's identification sticker (usually located on the driver's side door jamb) for an engine code.
- You can research the engine code online to find out if it corresponds to a DOHC engine.
It's important to note that not all Mercury Sable and Ford Taurus models have DOHC engines. Some may be equipped with SOHC engines or other engine configurations. If you have any doubts or need further assistance, it's best to consult with a qualified mechanic or your local Ford dealership.