FORD 2003 Mustang v.4 - Manual (Page 172)

1. Remove the cap
from the engine
coolant reservoir.
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).
15. If necessary, 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.
If you are unsure of how to operate the cooling
system vent plug when adding engine coolant to the
3.8L V6 engine, contact your dealer.
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Maintenance and Specifications
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