Ford Mustang Owner's Manual page 178

Maintenance and Specifications
Engine coolant refill procedure- OHV V6 engine
Note: Use the following procedure when refilling the
cooling system of a vehicle equipped with a 3.8L V6
engine. Failure to follow this procedure may result
in damage to the engine and engine cooling system.
The following procedure should be used when
refilling the cooling system of a 3.8L V6 engine after
it has been drained or become extremely low.
1. Remove the cap
2
from the engine
coolant reservoir.
3
1
2. Open the cooling
system vent plug.
3. Remove the radiator
cap as previously
outlined.
4. Add a 50/50 mixture of engine coolant and
distilled water to the radiator until full.
5. Add a 50/50 mixture of engine coolant and
distilled water to the engine coolant reservoir until
the coolant level is at the "cold fill level" as listed on
the reservoir.
6. Close the cooling system vent plug.
7. Reinstall the engine coolant reservoir cap.
8. Reinstall the radiator cap.
9. Start the engine and run it at 2000–2500 rpm
until the upper radiator hose is warm (this indicates
the thermostat is open and coolant is flowing
through the entire system).
10. Shut the engine off and allow it to cool.
11. Wrap a thick cloth around the radiator cap and
cautiously remove the radiator cap.
12. Add a 50/50 mixture of engine coolant and
distilled water to the radiator until full.
13. Reinstall the radiator cap.
14. Check the coolant level in the reservoir before
you drive your vehicle the next few times (with the
engine cool).
178
2004 Mustang (mus)
Owners Guide (post-2002-fmt)
USA English (fus)