is my car leaking coolant?

[sm32589g]

ok so i am starting to wonder if i have a leak in my system. Once every 1 month i have to replace about 8 ounces of coolant into my reservoir tank. is this normal or do i have a leak somewhere?

[Cheyne]

Sounds like you have a leak. Get your system pressure tested before it gets worse.

[kornkid8600]

Not normal.

[marinm88]

yeah man. get it checked out quick before it gets worse.

[robmpulse]

coolant system is a sealed system. Not only on your car, but EVERY car. That means if you have to keep adding it.... it's going somewhere....

Is this your first car?

[ks6gp0]

Get it checked may be as simple as a bad cap.

[slocar]

Are you sure you're not just overfilling it and having it blown out from under the cap?

[sweet e36 pimp]

^^^ what he said... top off when the motor is ice cold, it should be at the "kalt" (cold fill line) in the expansion tank.

[ptarditi]

Get it pressure tested, but even though the coolant system is a closed system the modern car runs at such a high temp that some coolant will eventually evaporate.

[amyracecar007]

I had an issue with the cooling system - long story short it said it needed coolant and it wound up with a totally new cooling system (from a to z). No matter what I do (keep coolant at full) it decides it likes to operate at about half way down from the cold/full line.
The sensors are all good, it never says low coolant except twice a year and it is still at its 1/2 full self preferred level. The system has been bled, pressure tested, and as I said completely replaced.
I decided the car has its own mind...or some sensor is lying to it....or I don't know but everything runs smoothly and I keep a close eye on regular pressure test and coolant flush.
I have even had different shops do the pressure test....car has been like it since i bought her about 5 years ago.

[MJFX328]

Originally Posted by amyracecar007

I had an issue with the cooling system - long story short it said it needed coolant and it wound up with a totally new cooling system (from a to z). No matter what I do (keep coolant at full) it decides it likes to operate at about half way down from the cold/full line.
The sensors are all good, it never says low coolant except twice a year and it is still at its 1/2 full self preferred level. The system has been bled, pressure tested, and as I said completely replaced.
I decided the car has its own mind...or some sensor is lying to it....or I don't know but everything runs smoothly and I keep a close eye on regular pressure test and coolant flush.
I have even had different shops do the pressure test....car has been like it since i bought her about 5 years ago.

The expansion tank should only be half full