Okay.. My chrysler 300 08 2.7 liter keeps on overheating.. I changed the thermostat and still gets hot.. And the radiator cap

Asked by Apr 15, 2017 at 06:03 PM about the 2008 Chrysler 300

Question type: Maintenance & Repair

2 Answers

73,795

Did you purge the cooling system when you re-filled it? The cooling system would have to be purged from the air pockets. Also the radiator fan needs to be in working order, Hopefully you don't have a bad water pump, plugged up radiator, or a blown head gasket. This sight shows you how to purge the cooling system... www.youtube.com/watch?v=zUpXgAJ1gjU

27,145

no water leaks RIGHT? thermostate not upside down Have you run a pressure test on the cooling system?.......do you have the right(pound) rad cap. coolant reserve/overflow tank and radiator Full.... ..... maybe a bad sensore and your high speed isn't kicking on all the time.....stuck closed thermostat, a Diagnostic Trouble Code (DTC) can be set......The powertrain control module (PCM) has been programmed to monitor certain cooling system components:...... .. are the fans/fan kicking on...is it worse standing still does it do ut at 50 mph (if not then are your fans working cause you dont need them at 50mph so they say your fans dont matter...anyway is there a code or codes???? all air out of system? a trick is to drill a few little holes in the thermostate as shown...is a rad hose collasping... its 8 years old is the rad fins inside clean... hope theres no bubble (emissions) ( gaskets/crackcoming out of the rad,filler,take it to a shop and have a block checked / head gasket checked to see if exhaust gases are getting into the cooling system. so you wont forget !!!! hummm..time for a break... > If the problem is sensed in a monitored circuit often enough to indicated an actual problem, a DTC is stored. The DTC will be stored in the PCM memory for eventual display to the service technician. It really could be a whole host of different things that can cause a high temp reading. Some things to check for: Is the temperature gauge reading correctly? Is the temperature warning illuminating unnecessarily? Coolant low in coolant reserve/overflow tank and radiator? Check for coolant leaks and repair as necessary. Pressure cap not installed tightly. If cap is loose, boiling point of coolant will be lowered. Poor seals at the radiator cap. Check condition of cap and cap seals. Replace cap if necessary. Check condition of radiator filler neck or degas bottle. If neck is bent or damaged, replace radiator or degas bottle. Coolant level low in radiator but not in coolant reserve/overflow tank. This means the radiator is not drawing coolant from the coolant reserve/overflow tank as the engine cools. Check condition of radiator cap and cap seals. Check condition of radiator filler neck. If neck is bent or damaged, replace radiator. Check condition of the hose from the radiator to the coolant tank. It should fit tight at both ends without any kinks or tears. Replace hose if necessary. Check coolant reserve/overflow tank and tanks hoses for blockage. Incorrect coolant concentration? Coolant not flowing through system. Check for coolant flow at radiator filler neck with some coolant removed, engine warm and thermostat open. Coolant should be observed flowing through radiator. If flow is not observed, determine area of obstruction and repair as necessary. Radiator or A/C condenser fins are dirty or clogged. Remove insects and debris. Radiator core is corroded or plugged. Have radiator re-cored or replaced. Dragging brakes. Check and correct as necessary. Fuel or ignition system problems. Bug screen or cardboard is reducing airflow. Remove bug screen or cardboard. Thermostat partially or completely shut. Check thermostat operation and replace as necessary. Cooling fan(s) not operating properly. Check cooling fan drive operation. Cylinder head gasket leaking. Check for cylinder head gasket leaks. Heater core failure.

Your Answer

Chrysler 300 Experts

  • #1
    Jetlounge
    Reputation
    1,930
  • #2
    Eddie_G1
    Reputation
    910
  • #3
    Whatisit
    Reputation
    830
View All

Related Models For Sale

Used Dodge Charger
453 Great Deals out of 28,013 listings starting at $1,979
Used Dodge Challenger
300 Great Deals out of 22,416 listings starting at $6,999
Used Ford Mustang
713 Great Deals out of 38,332 listings starting at $895
Used Chevrolet Impala
523 Great Deals out of 34,216 listings starting at $950
Used Cadillac CTS
286 Great Deals out of 10,013 listings starting at $1,395
Used Jeep Grand Cherokee
915 Great Deals out of 70,987 listings starting at $950
Used Honda Accord
1,135 Great Deals out of 62,430 listings starting at $1,199
Used Ford F-150
2,325 Great Deals out of 184,534 listings starting at $699
Used Nissan Maxima
294 Great Deals out of 23,317 listings starting at $899
Used Chevrolet Silverado 1500
2,135 Great Deals out of 167,426 listings starting at $1,900
Used Chevrolet Tahoe
651 Great Deals out of 39,638 listings starting at $1,000
Used Dodge Durango
305 Great Deals out of 21,540 listings starting at $2,195
Used BMW 3 Series
1,173 Great Deals out of 33,352 listings starting at $1,000

Used Cars For Sale

2017 Chrysler 300 For Sale
6 Great Deals out of 3,111 listings starting at $21,950
2016 Chrysler 300 For Sale
50 Great Deals out of 2,060 listings starting at $13,782
2015 Chrysler 300 For Sale
17 Great Deals out of 1,202 listings starting at $11,980
2014 Chrysler 300 For Sale
38 Great Deals out of 1,551 listings starting at $6,995
2013 Chrysler 300 For Sale
39 Great Deals out of 1,087 listings starting at $7,321

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.