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

76,235

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

1 of 1 people found this helpful.
28,045

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
    2,080
  • #2
    Eddie_G1
    Reputation
    920
  • #3
    David Mitchell Sr.
    Reputation
    840
View All

Related Models For Sale

Used Dodge Charger
55 Great Deals out of 739 listings starting at $3,488
Used Dodge Challenger
5 Great Deals out of 718 listings starting at $11,495
Used Ford Mustang
14 Great Deals out of 1,087 listings starting at $3,995
Used Chevrolet Impala
179 Great Deals out of 1,093 listings starting at $1,500
Used Jeep Grand Cherokee
161 Great Deals out of 3,543 listings starting at $3,500
Used Cadillac CTS
16 Great Deals out of 385 listings starting at $2,500
Used Honda Accord
78 Great Deals out of 1,121 listings starting at $2,000
Used Ford F-150
639 Great Deals out of 10,343 listings starting at $2,995
Used Chevrolet Silverado 1500
196 Great Deals out of 10,058 listings starting at $399
Used Chevrolet Tahoe
4 Great Deals out of 737 listings starting at $3,995
Used Nissan Maxima
37 Great Deals out of 382 listings starting at $2,495
Used Dodge Durango
178 Great Deals out of 1,104 listings starting at $4,490
Used BMW 3 Series
163 Great Deals out of 2,016 listings starting at $995

Used Cars For Sale

2017 Chrysler 300 For Sale
24 Great Deals out of 135 listings starting at $25,888
2016 Chrysler 300 For Sale
65 Great Deals out of 267 listings starting at $19,999
2015 Chrysler 300 For Sale
8 Great Deals out of 63 listings starting at $19,995
2014 Chrysler 300 For Sale
3 Great Deals out of 76 listings starting at $10,999
2013 Chrysler 300 For Sale
3 Great Deals out of 57 listings starting at $12,495

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.