Question about 2003 Honda Civic
Well my civic (2003) is over heating and its not the therm. its not the rad cap. and its not the head gasket. I had everything looked at. Some people thought maybe it could have air in it some where but we did try to push it out does any one know what could be going on??? Please help me
Sometimes when a radiator goes bad its due to blockage in the radiator core. It takes an infrared temperature gage to be able to see hot and cold spots in the radiator core. Hot spots are where the blockage is, Cold spots are where the coolant is flowing through properly. When you drive down the road and your engine RPM goes up, your water pump spins faster creating more pressure forcing coolant through the blockage in the radiator, when you slow down the coolant flow slows down which causes the coolant to be trapped in the engine longer which in turn causes the coolant to heat up forcing the engine temperature gage to go up. Replace the radiator and use a 50/50 mixture of coolant and water. Once you've filled up the radiator with your coolant mixture, remove the Top radiator hose where it attaches at the T-stat housing at the engine to bleed the cooling system of any trapped air, Top off radiator and install the radiator cap. Then fill the coolant overflow reservoir to the cold level mark. Start the vehicle and turn the heater on to full hot, with defrost on and fan speed on maximum, with the engine running accelerate to about 2000 RPMs till you feel hot air at the windshield vent. Leave the vehicle running and visually check for any leaks and make sure to top off coolant level at the reservoir. Test drive vehicle leaving defrost on maximum speed to see if heat fluctuates. If heat fluctuation is present let vehicle cool down and repeat coolant bleeding step. If fluctuation is persistent another problem is present and it could be in the heater core. Use a coolant pressure tester to find any leaks in cooling system.
Posted on Mar 14, 2009
Solve? Although I clicked the link to solve the problem, I have no answers but am tempted to go after honda.
Same problems still occuring on my 2003 honda civic (103,000)!
-Changed thermostat's twice (180 degree; Yes, it is correctly positoned with the jiggle tab to the top and the correct side facing the engine)
-Installed new water pump
-Checked coolant level
-Changed the timing belt
-Checked for head gasket symptoms (white exhaust, corrosion in cylinders/plugs, loss of fluid, checked cylinder compression (all check out)
-Had the entire system presure tested 3 times with no visible leaks
-Run the car for 45 minutes with no visible drips/leaks
-proped the front of the car up to get air out of the system
This weekend I had spare time on my hands so I replaced the thermostat (checked the other, which according to bioling water at 180 worked as designed) I flushed the entire system, took out the radiator and had it blown out, flushed the entire system, installed new upper and lower hoses, checked the fan switch, I will be replacing the coolant with new, installing a new radiator (since they cost only 100 online and I have the hole front end off anyway, I'll be reinstalling the fans and switches, and trying it out again.
I drive about 100-450 miles between overheating, but it is very sporadic.
Still have the same heater issues- cold air when stopped and not accelerating at times. I am tempted to check the heater core next- but there is no loss of fluid from that ethier?
When I get the system back together, I'll try running the car for a few weeks without the heat on to see if that corrects the problem.
All of the steps to repairing the cooling system seem easy and cost 1/10 of getting them checked at a shop if you have the time!
I'll update again next week!
Posted on Jan 05, 2009
I tired the coolant temp sensor and it didn't work also replaced the thermostat didn't work either
Posted on Oct 13, 2008
MAKE SURE UR ENGINE FANS ARE WORKING AND THERE IS ALSO A COOLANT TEMP. SENSOR THAT COULD BE BAD
Posted on Jun 12, 2008
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Posted on Jan 02, 2017
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