Question about 2003 Chrysler 300M

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2003 Chrysler 300m overheating

My chrysler is overheating... There is no fluid leak.. Fans are working and there is no other fluids mixed in my oil. It will go down if you put the heater on full blast. On idle it is not overheating

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  • exsmail Feb 13, 2009

    I have the same problem. The car only has 37,000 miles on it. There is really no reason for a headgasket to be cracked. The check engine light came on. I get a Thermostat Rationality code on my Scan Guage. The loop shows as closed, even as the temperature rises. I had the radiator cap replaced (one clever mechanics cure all for everything) and the thermostat replaced. It's still doing the same thing. I'm really curious because the problem started a year ago, then seemed to go away for a while. Now it's back. Any help appreciated in advance.


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Would recommend replacing thermostat first. could be sticking

Posted on Nov 16, 2008

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My 1Rz engine has oil in the radiator mixes with water but not water mixed with oil in the sump and its not overheating its running fine

toyota engine ...typicaly hilux Efi

inlet manifold gasket blown
corroded water jackets on the inlet side

if found to be sound
wont be long before the oil will mix with the sump
try re torque the head bolts as a stop gap
head warped or blown across water jackets of the block
and not the oil jackets yet


Apr 06, 2017 | Cars & Trucks

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Checked and changed everything 2006 pasifica is still overheating. Any ideas?

comment on if the car has electric fans or direct drive from the water pump
comment on when and the driving conditions when it overheats

Aug 25, 2015 | 2006 Chrysler Pacifica

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3.5, 04 chrysler hydrolic valve lash failer

Was the oil you drained very thick? If so this means someone had knew the big end or small end inside the engine was about worn out (very big job) Hopefully you changed the oil filter for a new one, Check your hydraulic fluid is okay worth draining & new fluid replaced look for Fluid leaking this may be the problem. If this dont work I suggest you ask a good Mechanic to listen & I expect the first problem IE: Big end, or small ends gone the engine needs large repair or look for another engine around scrap yards, sorry for bad news. Best Wishes, Malcolm Campbell.

Jul 03, 2017 | Chrysler 300M Cars & Trucks

1 Answer

Engine oil in coolant

what year, and do you service car.?
are you mixing AF fluid types. i bet yes. and is big time bad.
put oil there?
you can do the exhaust gas heck device a radiator cap filler
or the leak down test.

id do a full flush and fill and drive a week.
not the toxic mix is gone.
do not mix AF brands.

Feb 24, 2014 | Honda Pilot Cars & Trucks

1 Answer

I have a 2003 Chrysler 300M that has started having vibration and a bubbling sound coming from under the hood.

your car is overheating-may be a number of things-blown head gasket would cause bad running and bubbling sounds-have you noticed antifreeze leak out-have you noticed a sweet smell,hot antifreeze-cheers Denny

Nov 01, 2013 | 2003 Chrysler 300M

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Can transmition fluid get mixed with antifreeze on chrysler pacifica 2005

No, Your radiator has many small ports which when antifreeze is mixed with oil or transmission fluid creates a chocolate milk looking mixture. This will not cool your engine as it needs resulting in overheating, and or blowing of your head gasket

Apr 01, 2012 | 2004 Chrysler Pacifica

1 Answer

Fluids leaking but not losing any?????????????

ist problly leaking very little then but i would go get that fixed un less your checkers arent in all the way and the read the same evertime you check it

Feb 26, 2012 | 2001 Chrysler 300M

1 Answer

The thermostat don't work where is it located at to put it on the 99 chrysler 300m

Jacquelin! The thermostat n a 3.5 Chrysler 300M is on the block right next to, and toward the front of the engine by the oil filter. Yes, that sems a bit strange, but then I'm not a bit surprised about this engine any more. As the big radiator hose leaves the radiator finding its' way toward the block, it terminates at a traditional "goose neck" at the block behind the power steering pump- only accessible by removing the oil filter and using an extension and a u joint BUT FIRST: lower the anti freeze in the system by draining some fluid. But anyway- THAT'S where it is. Have fun, fix it up and GO!

Dec 12, 2011 | 1999 Chrysler 300M

1 Answer

My 1999 300m has trouble shifting into 1st usually in the morning when it is cold outisde goes into reverse fine but then to first it takes about a minute to shift

When was the last time you changed the fluid and filter? It could be dirty inside and in need of fresh oil. Chrysler 4 trans fluid ONLY. NO other fluid will do. Just between you and I, did you add the Mercon fluid by mistake??? It's okay to admit it!
Anyway, change the fluid AND the filter and see how she behaves in the morning. Let us know if this helped. If it doesn't, further diagnostics may be needed.

Oct 24, 2011 | 1999 Chrysler 300M

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