hi, i have a 98 civic ex d16y8, for some reason my coolant level jumped up higher than before. I checked the coolant level yesterday and it was sitting at below the MAX line, today i checked, it was way over the MAX line, almost fill to the top. and i checked it when the engine was still running. Anyone know why?

thx!!!

 

jordan88,
Did you bleed out the cooling system last time you changed the fluid? I usually just crack open the bleed bolt while I'm filling the system up, but I have seen people run the car with the radiator cap off until the system is up to temp.
Bogatyr

 

honda did that for me, it was a while i had the coolant flushed. and when i checked all couple times, they were all a little below the MAX line, but today when i checked it, it was way over it.

thx

 

Well when the engine is warmer the coolant level should rise. Heat makes things expand.

I would also try bleeding the system WHEN IT'S COLD! Take off the radiator cap, start the car and let it warm up. Air bubbles should come out of the system