Hello guys, car in discussion is HONDA CITY IDSI
recently, during a brief highway trip, the heat up sign showed. I stopped the car immediately, arranged water. It took me around 10-15 min. I opened the bonnet n filled the reservoir tank, but it had enough water as it seemed. Then opened radiator cap (there was no vapors) n poured water, but it seemed also had enough water.
I drove back, n during this time many times heat sign showed n i turned off the engine, waited for some time and drove back home. I checked at parking, there was no water leak, fans were turning on (may be AC, as i didn't check without AC), and heat sign appearing.
Due to heavy rains, i didn't get it checked for 2-3 weeks.
Then, by connecting obd, i checked the temp rise via it. Before going to mechanic, i washed externally the radiator, if there was dust blocking heat flow. Then city drive rose the temp upto around 100°C. Mechanic suggested to get radiator cleaned, so i did. It was dirty but not that much as much. It seemed usual,radiator guy said, it was dirty. After reinstalling radiator, when he was checking for fans to run, temp rose to 115C n then he revved engine, there heat sign blinked n fan started.
So i drove back to mechanic, he removed thermostat n said might there be blockage in the engine block.
So, i asked him to close it as such n put in radiator flush in it. Then on next day, i drove around 150 km on highway. Temp was rising upto 100C but when i came back, noticed that rubber hose to heater core was leaking, got it done.
Next day, i had to go to krchi early morning, so i drove with flush in the engine, temp was around 70C.
I replaced the flush with tap water n came to my city driving arounf 500km. At time temp was 70-90C.
Since, there has been no leakage, what could be the issue???
And now i m planning to clean the system with fresh water, get thermostat reinstalled and fill up with coolant.
Another question is should i reinstall the same thermostat??? I checked the thermostat if it was working or not, so i tested it in boiling water, it was opening n closing(i m not sure if it was fully opening or closing but it was working) thermostat pics attached.
