2011 Chrysler 300 overheating

Asked by GuruL668F Apr 26, 2019 at 10:50 PM

Question type: Maintenance & Repair

My 2011 Chrysler 300 developed an oil leak which
turnex out to be the oil sending unit so I replaced it.  
Then it ran hot. So I had the radiator, thermostat &
housing, all the heater hoses, the entire fan
assembly, plugs, intake gaskets, and pressure
tested for a blown head gaskets twice. It's still
running hot. While idling it maintains operational
temp. But as soon as you drive it within 10 mins it
begins to run hot. Please help.

2 Answers

88,265

If it ran fine at speed and overheated at idle, I'd suspect a fan problem. But your overheating problem presents when driving. You did a lot of work on this car and the one thing I don't see addressed is the water pump, which is the leading cause of problems like yours. Start by checking coolant flow. Is the top hose hot? if not it's the thermostat. If it is, with radiator cap off see if there is flow. If not, it's the water pump or a clogged radiator. If flow, purge air from the system (videos on line explain this simple procedure). This covers 90% of overheating problems.

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