Hey guys i got a b18c5. And when i am driving the temperature will go to about the halfway point it is suppose to be.

Then i keep driving then the temperature drops back down and keeps fluctuating

Is this a bad therostat?

Please help thanks guys~~!

 

Most likely a bad thermostat. If you replace it, buy a genuine Honda one. FWIW, I would also recommend genuine Honda coolant.

 

thanks! you think i should replace the coolant while im at it?

Thanks~

 

Most of the coolant will spill out when you take out the housing/thermostat.