Engines are more efficient when they are clean because grease and dirt buildup keep the engine warmer than normal.
When washing:
  • Take care when using a power washer to clean the engine. The high-pressure fluid could penetrate the sealed parts and cause damage.
  • Do not spray a hot engine with cold water to avoid cracking the engine block or other engine components.
  • Spray Motorcraft Engine Shampoo and Degreaser on all parts that require cleaning and pressure rinse clean. In Canada, use Motorcraft Engine Shampoo.
Note:   If your vehicle has an engine cover remove the cover before application of Motorcraft Engine Shampoo and Degreaser. Immediately rinse away any over spray.
  • Never wash or rinse the engine while it is hot or running; water in the running engine may cause internal damage.
  • Never wash or rinse any ignition coil, spark plug wire or spark plug well, or the area in and around these locations.
  • Cover the battery, power distribution box, and air filter assembly to prevent water damage when cleaning the engine.

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