In the past 3 months i've had to add at least a gallon of coolant, twice to my trucks coolant tank. There are no leaks that I can see and my engine oil is clean. I've noticed a few times after parking my truck and walking by it sometimes I can smell coolant but like I said, I could not find any leaks.
I was told by a friend that it could be going into the cylinders, my question is, how can I tell if this is what's happening?
