I bought a 2012 Dodge1500 Hemi from a used auto dealership three weeks ago. One day later I noticed a ticking from the engine. I live several hours from the dealership so I took it to a local repair shop. I was told I had a drivers side exhaust manifold leak but that the ticking was coming from deeper in the engine so unrelated. I have a 30 day warranty so I drove 3 hours to have the truck fixed. The owner is now saying that all hemi engines tick and will not fix the exhaust or check further. He said no check engine light no problem. I do Not think this makes sense.. Thoughts?