NOTE: If equipped.
4. Install the underbody shield.
5. Install the Airlift Cooling System Tester UVU550000 or equivalent and follow the manufacturer's instructions to fill and bleed the system.
Use the General Equipment: Cooling System Vacuum Tester and Refiller
6. 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]).
7. 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
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.