1999 Chrysler 300 Overheating and leaking coolant

84,350 MILES • 6 CYL • 2WD • AUTOMATIC
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MORAVIAN2
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  • 1 POST
My car is fine until I drive it about ten miles then it overheats and leaks coolant. What is causing this?
Apr 2, 2009 at 11:27 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Get it block and pressure tested-When its leaking its gonna overheat you're losing coolant.
Apr 2, 2009 at 11:42 AM
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EODANIEL
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  • 3 POSTS
In mine someone replaced the radiator a while back and didn't conceal with wiring harness for the fans when they put everything back. Harness rubbed against a belt, exposed wiring, shorted. No fans means overheating if coolant gets too warm.

I read an article recently that had about a dozen things that can cause overheating. Some are simple, some are not.

Bad radiator cap - If not sealing, contents aren't under pressure and boiling point is lower than it should be.

Stuck Thermostat - If stuck closed, coolant is just circulating in the block and not making it to the radiator.

Fuses annd relays - Blow fuse to fan and you won't be cooling properly.

It would help to know what the weather is like for you when that happened (and I recognize this is an old post). If it is 32F out and you are overheating in 10 miles, that's not good. Low coolant/trapped air - something like that.
Jun 11, 2009 at 1:46 AM
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