I have a 2018 CX-9 AWD with almost 31k miles. Just recently found out about the cracked cylinder head problem on this forum. Out of curiosity, I checked the engine coolant reservoir level on mine while the engine was cold and found that it's right at the low L mark. I opened the radiator cap and saw the green coolant in there which is good, so at least the radiator is full. The car has never overheated on me, but I'm concerned now that I might be at the early stages of this cracked cylinder head problem.
I bought the car new in December 2017, so I've had it for almost 5 and half years. Is it typical for the engine coolant reservoir needing to be topped off all the way to the full line in that much time or could I have a slow leak developing? I do my own oil changes and maintenance, but can't say I really looked closely at the engine coolant level all these years since I know it doesn't need servicing for like 120,000 miles. I should've kept a closer eye on it. I do know that I don't have any external signs of a leak because I removed the large cover under the engine to get eyes on the transfer case as I'm planning on changing that oil soon. I didn't see any fluid stains on the inside of the large cover, nor do I have fluid stains on my garage floor where the car is normally parked.
I bought the car new in December 2017, so I've had it for almost 5 and half years. Is it typical for the engine coolant reservoir needing to be topped off all the way to the full line in that much time or could I have a slow leak developing? I do my own oil changes and maintenance, but can't say I really looked closely at the engine coolant level all these years since I know it doesn't need servicing for like 120,000 miles. I should've kept a closer eye on it. I do know that I don't have any external signs of a leak because I removed the large cover under the engine to get eyes on the transfer case as I'm planning on changing that oil soon. I didn't see any fluid stains on the inside of the large cover, nor do I have fluid stains on my garage floor where the car is normally parked.
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