Have already replaced (within past few months) head gasket, radiator, water pump, timing belt, heater hoses, thermostat, fan relay, temperature sensor ... flushed system multiple times (most recently today) ... on 70 degree days, engine temp is great ... by 80, engine temp will begin to rise after 20-30 minutes on road IF a/c is on, temp rises until I switch to heater, and then levels off or drops slowly. ... has been checked for air in system, coolant levels, etc. not sure what to check or do next.
Have you verified that system has been "burped" of air? That the fans kick on? Check radiator hoses for kinks. You can try running without the thermostat to see if that helps and can identify if the thermostat could be a problem. You may need to check your coolant mixture too.
Sounds like you have reduced flow or restriction in cooling (heat exchanger) as it runs fine at cooler temp but can't keep up when it gets warm.
New parts don't always equal working fine parts.
SOURCE: 98 dodge dakota slt 318. no heat, low operating temp
First thing first, turn off the engine wait for 15 - 20 mints, open the radiator cap and fill it up to the top then start the engine and see if it needs more water adn add as needed, then wait till you ca see the water circulating in the radiator now instead of corculating if it starts boiling out shut the engine replace the thermostat and do the whole thing again.
unless there is water in the engine the gauge will not be able to show the actual temp of the engine, so always malke sure you have water / antifreeze
SOURCE: Engine runs hot on 2001 Stratus R/T 3.0L V6
Hello, as previously suggested by my collegue it appears you have an air lock. Have you tried parking the vehicle on level ground, from cold with radiator cap off start the car and leave it idling. Make sure the fluid/coolant levels are o.k. and let the engine reach operating temp. Keep some warm water handy and watch/listen the water/coolant system (Keep a safe/sensible distance from radiator) hopefully after a while the system will bubble and boil up let it settle for a few seconds and then top up with very warm water do this until it hopefully stops belching out of radiator. Replace cap and hopefully top and bottom hoses will be warm. Oh! nearly forgot keep all heater controls on hot with blower on full..(Inside the vehicle)
Finally I'm not joshing but is the thermostat in the right way round and functioning correctly? to test drop it in some boiling water it should open almost immeadiatly.
sorry for the epic but I'm here to help and hopefully save you time and money.
Good luck and a Happy New Year to you and your family!
Paul 'W'
SOURCE: my 1997 dodge neon sohc auto check engine light is
First, the easy way is to just bypass the relays all together. Install a switch on the inside of the car like you would fog lights. This will solve the problem of replacing thing after thing and wasting money. Just a $7.00 fix. After doing that unplug all the sensors and then the battery for at least 60 second to reset the computer. Than restart the car and the check engine light should go out, may take a day or so. Same thing with your gas cap, re-securing it will take a day or so for the light to go out. Good luck. I love my '97 neon.
SOURCE: 1997 dodge neon. replaced coolant temperature
1997 Plymouth Neon, have replaced radiator, radiation cap, thermostate and hoses, still run hot. Fans do not seem to come on, where is the temperature sensor on this vehicle?
SOURCE: 1996 dodge ram. Vehicle runs hot. I have replaced
Hello there"
sounds like you have done a lot with this there is a few things that you can do to ensue every thing is running right.
first if you can get a handheld thermal gun and check the temperature at the temp sensor on the radiator or block then see what it reads compared to the guage to ensure the guage is correct.
next check the temperature at both the top and the bottom of the radiatoer if there is a big difference in temps the radiator is partially blocked a radiator will increase 30 to 100 degrees if the radiator is 20 percent blocked.. also check to ensure that the radiator hoses are not collapsing.
Now ensure that you are not gettin air in the system by way of the water pump gasket or by loose hoses ok?
and finaly check to ensure that the heater core is not leaking and drawing air into the system or is clogged this will make a vehical give the overheating symptom also ok?
Let me know how this is going
Best regards mikle
An
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