Ford Mustang Owner's Manual page 266

Cleaning
• 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 (ZC-20) on all
parts that require cleaning and pressure rinse clean. In Canada, use
Motorcraft Engine Shampoo (CXC-66-A).
• 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 highlighted areas to prevent water damage when cleaning
the engine.
3.7L V6 ENGINE
266
2011 05+ Mustang (197)
Owners Guide, 1st Printing
USA (fus)