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Jeri 11/14/2021

2014 Dodge Charger SXT 6 Cyl 3.60L


Overheats while idling

So I've been having a overheating issue with my 2014 Dodge Charger sxt 3.6L it over heats while idling I replaced the radiator, the water pump, the temp sensor, overflow cap, and I also removed the thermostat because it was overheating and it still overheats without a thermostat and the only way it doesn't over heat is it I bypass the fan and the fan I believe is operating at low speed when the vehicle hits 219 and then shuts off at 212 please help resolve this and I did a leak down test on all cylinders and all of them pass with a leakage of 15% or less and I did a radiator pressure test at 18 pounds and it was steady and there wasn't any signs of leaks

1 Answer


Jimm 11/20/2021

First question - does the coolant boil or bubble in the overflow tank? Second question - how many miles are on the vehicle? Third question - how much time and/or mileage since the last cooling system service (new hoses and clamps, with flush and refill)?

Given the tests described and work / parts replaced - there are at least still three possibilities:

Partially Blocked Heater Core or Cooling System
Descale and clean the system with a caustic chemical flush - either liquid or powder
Prestone, Irontite or Gunk are useful brands

Low Coolant / Improper mixture:
While it seems counter intuitive, when your system is low on coolant, it may run ok with wind hitting the radiator, but when idling there's just not enough coolant to properly cool the engine. Incorrect coolant mixture = not at 50/50.

Air in the Cooling System:
Sounds like you have not fully burped this system, still has an air pocket somewhere.


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