14. Fill the degas bottle to the MAX FILL line.
15. Recommended coolant concentration is 48/52 to 50/50 engine coolant to distilled water (freeze protection -34˚C to -37˚C [-30˚F to -34˚F]).
16. For extremely cold climates (less than -37˚C [-34˚F]):
It may be necessary to increase the coolant concentration above 50%. NEVER increase the coolant concentration above 60%. Maximum coolant concentration is 60/40 for cold weather areas. A coolant concentration of 60% provides freeze protection down to -50˚C (-58˚F) Engine coolant concentrations above 60% will decrease the overheat protection characteristics of the engine coolant and may damage the engine.
17. For extremely hot climates:
It is still necessary to maintain the coolant concentration above 40%. NEVER decrease the coolant concentration below 40%. Minimum coolant concentration is 40/60 for warm weather areas. Engine coolant concentrations below 40% will decrease the freeze and corrosion protection characteristics of the engine coolant and may damage the engine.
18. Vehicles driven year-round in non-extreme climates should use a 48/52 to 50/50 (freeze protection -34˚C to -37˚C [-30˚F to -34˚F]) mixture of engine coolant and distilled water for optimum cooling system and engine protection.
19. Install the degas bottle cap until it contacts the hard stop.
20. Turn the climate control system off.
21. Start the engine and increase the engine speed to 3,500 rpm and hold for 30 seconds.
22. Turn the engine off for and wait for 1 minute to purge any large air pockets from the cooling system.
23. WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew
the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
Check the engine coolant level in degas bottle and if necessary fill to the top of the MAX FILL line on the
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.