How I ruled out the head gaskets and cracks is I wasn’t experiencing any other symptoms that would exhibit, like poor engine performance. My spark plugs look normal. Upon more careful inspection when I had my engine running, I did start seeing small drops of coolant coming from the front of the engine, abouts where the water pump is located. Reason I don’t see any puddles under my truck is because the coolant gets captured by some plastic pieces on the bottom.