2019 Challenger R/T Scat Pack - Coolant Flush Interval & Type?

ClearTheCode admin answer:

For your 2019 Dodge Challenger R/T Scat Pack, the recommended coolant type is Mopar OAT (Organic Additive Technology) coolant, specifically the purple-colored variant. It's crucial to use this exact type as mixing different coolant technologies (like HOAT with OAT) can lead to chemical reactions, gelling, and severe damage to your cooling system components, including the radiator, water pump, and heater core.

Coolant Flush Interval:

Dodge typically recommends inspecting the coolant level and condition annually. For a full coolant flush and replacement, the general guideline for OAT coolants in these vehicles is around 10 years or 100,000 miles, whichever comes first. However, given you're approaching 60,000 miles, it's a good time to thoroughly inspect the coolant's clarity and pH. If it looks discolored or murky, or if you've had any cooling system repairs, an earlier flush is advisable.

DIY Coolant Flush Steps:

1. Preparation: Ensure the engine is completely cool. Gather your tools: a drain pan, new Mopar OAT coolant, distilled water (if diluting concentrate), a funnel, and a torque wrench for the drain plug.
2. Drain: Locate the radiator drain plug (petcock) at the bottom of the radiator. Place your drain pan underneath and open the plug. Remove the radiator cap to allow for faster draining. Some models may also have engine block drain plugs for a more complete drain.
3. Flush (Optional but Recommended): Once drained, close the drain plug. Fill the system with distilled water, run the engine with the heater on high until it reaches operating temperature, then drain again. Repeat until the drained water is clear. This helps remove old coolant and contaminants.
4. Refill: Close all drain plugs. Using a funnel, slowly fill the system with the correct Mopar OAT coolant (pre-mixed or 50/50 with distilled water if using concentrate). Fill the overflow reservoir to the 'cold fill' line.
5. Bleed Air: Start the engine with the radiator cap off (or using a specialized spill-free funnel). Run the heater on high. As the engine warms up, air bubbles will escape. Squeeze the upper and lower radiator hoses to help dislodge air. Top off coolant as needed. Once the thermostat opens and the fans cycle, replace the radiator cap.
6. Monitor: Drive the vehicle and monitor the temperature gauge. Check the coolant level in the reservoir over the next few days and top off if necessary.

When to See a Shop:

• If you're uncomfortable performing the procedure yourself, especially the air bleeding process, which is critical.
• If your vehicle has been consistently overheating, or if you're getting related OBD codes like P0117 (Engine Coolant Temperature Sensor Low), P0118 (Engine Coolant Temperature Sensor High), or P0128 (Coolant Thermostat (Coolant Temperature Below Regulating Temperature)). These could indicate underlying issues beyond a simple flush.
• If you notice persistent leaks or unusual noises from the cooling system after the flush.
• If the coolant looks sludgy or has an oily film, which could indicate a head gasket issue.