Learning the Chrysler Coolant Rainbow

It should be noted that Chrysler released a new engine coolant for the 2013 model year vehicles and beyond, for all engine applications except the 2.2L and 2.0L Diesel engines. The new coolant is an organic additive technology (OAT). OAT coolants have a service interval of 10 years or 150,000 miles. For heavy duty truck and extreme duty cycle applications, refer to the service information or owner’s manual for proper maintenance schedules.

Coolants of different technologies are not compatible or interchangeable (OAT, HOAT or IAT). Mixing these coolants could result in accelerated corrosion within the engine and cooling systems, an ammonia odor or debris particles floating in the coolant.

Pink HOAT coolant.

Further inspection may find corrosion in the system. This could show up as aluminum pipes turning black in the coolant system, engine overheating or leaks in the cooling system.

If OAT (Mopar P/N 68163848AA Purple) has been mixed with HOAT (Mopar P/N 68048953AB Pink or factory fill HOAT Orange, or any other coolants, it will be necessary to flush the cooling system.

Orange HOAT coolant.
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Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Editor

Mike received a BA degree from Youngstown State University in English Literature with a minor in Journalism in 1975.