Originally Posted by 07Versa6MT
Huh... that's probably it then. What did you do on that car between then and now?
Originally Posted by rstolz
Sounds to me like your T-stat is stuck, or your water pump failed.
when coolant isn't circulating it will get superheated in the engine block, begin to expand and eventually boil, pushing fluid back into the reservoir, making the level rise.
at highway speed, with a bad waterpump, there's still some circulation, and the airflow through the radiator will cool the fluid enough to hide the issue.
I have solved this problem.
If anyone search for tis I think this would help.
Issue: Overheating when on stoplight, but on highway speed temp is normal.
1. I checked the everything I can check.
a. I check the fan, it is working and rotating and though I should look into other issues.
b. I checked thermostat, it is working, fluid is circulating ( i checked by holding the lower and upper hose. upper is hot and lower is slightly less hot).
c. Water pump is almost new, almost a year or so and I can disregard this issue.
d. Relays, fuses, checked. all working. Found one missing relay but when i checked and verify, its not for the radiator fan so I can disregard this issue.
So I though of going back again to the first issue since for my average skills in troubleshooting I can't think of any other way to solve this.
I went back againt to the road, drive, stops, then car overheats. I opened the hood and fan still working. Stop the engine and start it, fan now not working. I pushed it with a stick and behold, it rotates.
So, went back to drawing board (start), checked the fan again.. compare it with my friends car and whoalla!! fan is rotating slower than normal, and in reverse!!! (fan blowing towards the radiator not sucking up the heat from it so all the heat from the engine is being transferred to the radiator. Be informed temp here in middle east now is around 49 degress celcius too hot!!!).
Went to a garage, changed the motor with a refurbished one and test. I drive, stop, parked and wait.. and wait till it overheats... and no overheating happens...
fan is turning like 4 times faster than before, now sucking up all the heat away from the radiator unlike before.
Readers, just so you know, if the gfan is working, it doesn't mean there is no problem. Check the fan speed, and the direction (it should suck away heat, not blow on the radiator).
Now, i am never worrying anymore about going on stops and parks... And my wife is pregnant so I am glad I have solved this issue once and for all or else we will be toasted inside the car with this kind of heat in M.E.
It hss solved my a/c problems as well. Now the air is cold compared before. It cools faster during the afternoon than before where i have to suffer heat inside the car before the a/c can suck up all the heat.
Total cost: $30 (installation of refurbished fan motor and installation included).