96gstdsm
15+ Year Contributor
- 808
- 2
- Aug 7, 2006
-
monroe,
New_York
My car has just finished getting many mods, one including a fmic that has been giving me some cooling problems. I have been overheating. The highest I have seen was 224 that was on the hottest day of the year. The temps only get really hot when I am on the highway and only sometimes with the stock needle go up to almost 3/4 to hot. I had a logger hooked up before to monitor the temps but don't have it hooked up at the moment.
I checked my coolant levels and they were a little low, so I added some water and coolant. My overflow was right at the correct level.
After driving for some time and then checking it again the next day, I looked and my overflow tank was overfilled and my coolant levels in the radiator and all went down.
I am not burning any coolant or anything and have no smoke or anything coming out.
Why does my coolant keep going from my radiator and lines to my overflow tank?
Could a bad radiator cap cause this? I have a new one I am putting on as soon as it cools down.
Would just overheating in general cause this?
Also why would my car only sometimes overheat when on the highway going the same speed and with the temperatures outside being the same. When driving around they will go up and down when traveling at the same speeds. And sometimes during my trip the needle will stay right around the middle line if not below and other times it will be 3/4 to hot.
The needle acted the same when I was able to monitor the temps as well.
I checked my coolant levels and they were a little low, so I added some water and coolant. My overflow was right at the correct level.
After driving for some time and then checking it again the next day, I looked and my overflow tank was overfilled and my coolant levels in the radiator and all went down.
I am not burning any coolant or anything and have no smoke or anything coming out.
Why does my coolant keep going from my radiator and lines to my overflow tank?
Could a bad radiator cap cause this? I have a new one I am putting on as soon as it cools down.
Would just overheating in general cause this?
Also why would my car only sometimes overheat when on the highway going the same speed and with the temperatures outside being the same. When driving around they will go up and down when traveling at the same speeds. And sometimes during my trip the needle will stay right around the middle line if not below and other times it will be 3/4 to hot.
The needle acted the same when I was able to monitor the temps as well.