Honda Accord 2002, Getting Little over heat (The most weird problem)?

Question

My Honda Accord 2002 used to have normal temperature upto 35% (exact at all times), But these days from past week it fluctuates from 35% to 70%. If i drive fast its normal with or without ac. But if i drive slow in traffic it start rising upto 50% - 60% and if at that time i turn AC on or put in neutral and give extra race (throttle) then it come back to normal. Else it shoots upto 70% to 75% and then automatically start coming down to normal after 15-20sec of staying there.

Checked my battery: its fine as per the meter at the workshop and it starts in single self in morning. Radiator has coolant and its bottle also have enough coolant, No leakage of coolant from anywhere. Both fans of radiator working fine and cut off also automatically. Its one of the weird problem i have seen. Please advise me that what could be the problem.

Answer 1

My guess is the radiator is dirty or becoming plugged. With the motor cool, try spraying a cleaner like Simple Green or Formula 409 onto the front of the radiator. Then using a hose squirt the cleaner back off. You are trying to get water to squirt throught the cooling fins into the engine compartment, much like the wind would blow through the radiator while driving.

Also have the quality of your coolant checked. It is not just how much, but it does also break down over time.

If that doesn't help I would then dig deeper into the cooling system. Next I would get the system pressure flushed, then maybe thermostat and waterpump.

Good luck

Answer 2

Check your thermostat, if its a pain to fix you can do without it, also check the fan relay, and have your water system flushed

Answer 3

Check your thermostat. Check the quality of your coolant. im me me if you have any more questions

Answer 4

check your themostat, check the temperature of the 2 radiator hoses, they should be roughly the same temperature, if they are vastly different, it COULD be your thermostat