FORD 2012 Flex v.1 - Manual (Page 318)

• 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.
3.5L V6 engine
Cleaning
318
2012 Flex (471)
Owners Guide, 1st Printing
USA (fus)