My husband and I have a 2006 Chevy Malibu LS, 4-cylinder, automatic transmission, and it has about 137,000 miles on it. We’ve owned the car since 2008 and have had very little trouble with the car, except this one issue. Since the fall of 2012, the car has been leaking coolant. It’s not leaking to the ground and it’s not leaking into the engine (oil is clean). No less than 5 mechanic shops have looked at the car (including a Chevy dealership), and all shops informed us that they are unable to find a leak. So it’s magically loosing coolant?!?!?! I find this hard to believe.
Sure, they’ve all done their pressure tests, but the car passes and therefore they can’t tell where the leak is located. A few of the car shops speculated that leak could be so small that the coolant was burning off right away. And since it’s not leaking into the engine, it’s not a huge problem so they suggest we leave it alone. One or two mechanics have uttered the words “head gasket” as a potential culprit but no one wants to pull the trigger since it’s so expensive to fix. Six months ago we did add a sealant product into the radiator tank and that seemed to resolve the issue temporarily, but after a few months the coolant reservoir was clogged and coolant wasn’t passing through the car and it was starting to overheat.
It’s been a year since the problem started, and within the last couple of weeks the car has started to HEMORRHAGE coolant. And by hemorrhage I mean my husband will fill the reservoir tank up and by the end of the day the car is indicating “low coolant” again and sure enough he’ll pop the hood and the tank is nearly empty. The problem is so bad that in the last couple of days we’ve gone through a gallon of coolant. We use DEXCOOL which is recommended for that car, not the 50/50 stuff. We have noticed the hemorrhaging may have coincided with the drop in temperature, we live in Minnesota. At the rate we are putting coolant into the car, it will quickly become very expensive. We would rather figure out the real issue and fix that problem, despite the cost. We are tired of hearing that mechanics can’t find the leak. We would greatly appreciate any advice or suggestions you may have for us! Thank you in advance!