Why does thermostat go bad on a 98 civic ex? i'm on the third in 6 months.?

fan motor kicks in at the right time. the first time i changed thermostat it did look like it was the original, but after that i changed again cuz temp. would rise during idle. should i get therm. from dealer?
Why does thermostat go bad on a 98 civic ex? i'm on the third in 6 months.?
flush the system out...check if your water pump is leaking any water or making any noises...if it does then its bad....also check your radiator if its cracked or plugged up and if there are alot of the blades of the radiator bent or jamed with debri....also did you make sure you got all the air out of the system...air in the system will cause it to heat up....
Why does thermostat go bad on a 98 civic ex? i'm on the third in 6 months.?
Maybe you have a build up of crud in your water system. You should flush it before you replace the thermostat next time.
doesnt sound like your thermostat. it sounds like a blown head gasket
Hi,

Your engine temp. is supposed to go up to about 190 degrees during idle, because the engine is running.

Here's how to check if your thermostat is good.

#1. take out thermostat.

#2 Put it into a pot of water on your stove.

#3 Turn on the flame, stick a meat thermometer in the water.

#4 When the water temp. reaches about 185 to 195 degrees,

watch the thermostat-it should begin to open.

#5 if it doesn't open it has a worn out spring and is no good.

Good Luck
It's probably your water pump. I had that same problem. 3 thermostats is way to many.
your radiator is no good,pluged up and not flowing enough at idle,very common problem
The way you describe this sounds like a head gasket problem. You need to take this to someone who has the tools to check carbon monoxide (CO) in the cooling system. All this tool is is a chemical that changes color when CO is detected and is specifically designed for measuring levels of CO in the cooling system.

Good Luck

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