Car losing coolant?

ANDREWMCNEIL32

MEMBER
2012 CHEVROLET MALIBU
115,000 MILES

Hello, I noticed the other day my temperature gauge was elevated. It was not in the red, but it was headed in that direction it appeared. So I pulled over and checked the coolant reservoir levels. I couldn’t see any coolant in the reservoir so I added some to the reservoir. I filled it up when the engine was cold to the minimum line. I have noticed after a few drives and adding more coolant since then the coolant level is no longer at the line, but barely visible when I look at the reservoir. I've added maybe 3/4 of a gallon of coolant. My car hasn’t run hot, except for my previous experience, there are no visible leaks, and no smoke or coolant smells. Is this necessarily a leak? I am assuming my mechanic checks the coolant levels when I get my oil changed. Would evaporation cause this amount of coolant loss? Just trying to prevent any major problems. Thanks

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,867 POSTS

Hi,

It is possible for coolant to very slowly evaporate, but being in a sealed system usually prevents it from happening.

As far as having to add coolant a couple of times really isn't a concern at this point. The radiator may have been low, so the first time you added, it drew it all in. Keep an eye on it and if it constantly goes low, let me know.

Since you are not seeing any leaks, I want you to read through this link. This isn't what I think is wrong, so don't worry. But I want to confirm the coolant isn't going somewhere you can't see. Read through it and do the checks you feel comfortable doing. Let me know what you find.

https://www.2carpros.com/articles/head-gasket-blown-test

Also, let me know what size engine the vehicle has. It could be a 4 cylinder or a 6 cylinder.

Take care,

Joe