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Replaced a thermostat on a 2001 chrysler 300m but car still overheats. Bled coolant system, turned on the heat while engine iwas very hot and no heat,whats wrong

Replaced a thermostat on a 2001 chrysler 300m, bled cooling system & still overheats. Turned on heater after enginr was very hot and no heat, whats wrong?

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Posted on Apr 08, 2013

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Overheating


Be sure the radiator is full of coolant, Start the engine when cold, while engine is running feel the top radiator hose. As the engine warms up the upper radiator hose will suddenly get hot when the thermostat opens. If the upper hose stays cool, the thermostat may be stuck closed. If thermostat is stuck closed It must be replaced.

Without knowing more about your car, this is all I can recommend.

Apr 23, 2014 | 2001 Chrysler 300M

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Radiator fan on my 2001 pt cruiser only engages when the air conditioner is on. When the heat is on the fan doesn't work causing the car to overheat. Do I need a new fan?


probably not . There are fuses to check and a relay to check as well as the coolant temperature sensor to check . If the engine overheats when you have the heater on it suggests an air lock in the cooling system . Have the system pressure bled along with all the other checks.

Feb 08, 2014 | 2001 Chrysler PT Cruiser

2 Answers

No heat after water pump replaced 2001 300m 3.5l


Did you change the thermostat? It could be stuck in the open positon, or in backwards, or missing all together. I would like for you to check your heater hoses where they connect to the engine, as this is a very good place for corrosion to build up, restricting coolent flow to your heater core. If this don't fix your heat, I would like to know the reason you changed the water pump. Was it overheating? Did you have heat before you changed the water pump?

Dec 08, 2013 | 2001 Chrysler 300M

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ALL I GET IS COLD AIR FROM HEATER. HAVE CHANGED THERMOSTAT, BLED COOLING SYSTEM AND HEATER HOSES GOING TO HEATER CORE ARE BOTH HOT. SOMEONE TOLD ME ACUATOR BUT IT MOVES FROM VENTS TO DEFROST AND FLOOR...


There is also an actuator for temp control. It moves doors in the duct work for heat and for cold air. that is the one that needs replacing. the one you are talking about just moves airflow positions.

Nov 01, 2013 | 2001 Chrysler 300M

2 Answers

MY 2001 CHRYSLER LHS IS OVERHEATING. THERE IS NO VISUAL LEAKAGE. I PUT WATER IN IT AND IT DID NOT RUN HOT, HOWEVER, AFTER PUTTING WATER AND COOLANT, AFTER 10 MINUTES OF DRIVING, IT RAN HOT. WHAT CAN...


1. The thermostat in the cooling system could be sticking and need replacing. If it sticks in the closed position coolant cannot flow to and from the radiator and the coolant circulating through the engine will quickly overheat.

2. The water pump may be on its last legs and require replacing. If the pump has failed (and they do) the coolant will not circulate through the engine and radiator as it is designed to do and it will overheat quite quickly.

3. There could be a build up of debris in the cooling system that is impairing coolant flow through the engine. This can occur if the cooling system is not fully flushed out every 2 years and the coolant replaced. The cooling system must then be bled to remove all air. When replacing the coolant you MUST use the correct product as specified by the manufacturer and in the correct mix.

4. Radiator caps must be sound (and the correct specification) to ensure coolant does not escape and result in a low coolant condition and then overheating.

You need to get your car to a competent mechanic quickly to check and rectify the problem. (You may find it is only the thermostat as this is a common problem with time and usage.) Driving your car with an overheating condition WILL result in expensive engine damage. The head gaskets will blow and the heads on the engine will crack. Additional engine damage is also possible.

Cooling systems must be well maintained to prevent overheating and consequential engine damage.

Nov 27, 2010 | Chrysler LHS Cars & Trucks

3 Answers

2001 300m overheating problem.


When the vehicle overheats, do u check the water/coolant level in the radiator? If it has reduced, it means ur leaking and u should inpsect to c where the leak is coming from. If the level has remained the same, probably ports are blocked or something to that effect. Keep me posted though

Jan 28, 2009 | 2001 Chrysler 300M

1 Answer

2001 Chrysler 300M Engine Overheated


I had an overheating problem with my 2001 300M....removed the thermostat two years ago and have never had a problem since....it does get cold in the Winter but warms up enough so you don't freeze. I don't think most service centers know that the thermostat goes in BACKWARDS from most cars...due to the coolant coming through a small line through the head....which often gets clogged up...thus the thermostat doesn't work properly. I just decided to remove the thermostat and have had no issues with the car driving it that way.

Jun 20, 2008 | 2001 Chrysler 300M

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