water reservoir always full

[milesaldrich]

my car is civic 02 vtec. my problem is my reservoir is always full after running for atleast 3-6 hours. sometimes I encountered high temp after a long drive. I already "rekta" my radiator fan but just yesterday, I encountered high temp after driver for 6 hours. I already replaced my radiator fan motor, replaced oem thermostat. Any other suggestions? Please help

[Benzmizer]

Check your water pump. It may have already gone south.

[phezthie]

check rad cap first..

[xtian119]

The radiator cap is most likely the culprit have this replaced.

[milesaldrich]

thanks for the replies guys. I have my radiator overhauled and with a new radcap. Just this morning I brought my car to servitek sucat. I explained what happened, the mechanic checked the car and found out that my lower rad host is cold wherein my upper radhost is hot. He told me that the problem is with my newly replaced thermostat. what do u think? HE told me that my thermostat stuck up. Is this possible? can be the reason of my high temp?

[phezthie]

yes, stuck'd close thermostat will definitely cause your engine to overheat..Why? no coolant circulation... if stuck'd but partially open, it will still overheat after a certain point and will cause your coolant to evaporate through the rad cap and then to reservoir... if stuck'd fully open (which is highly unlikely) it will not overheat, assuming no other problem in the cooling system, but it will take time before your car will achieve its running temp... HTH