NHTSA Complaint #11698027 — 2019 DODGE DURANGO

Last year I notice water in my tail lights. I removed the bolt to help drain the water. Part of my tail lights is now burned out. Now at 77,000+ my start/stop light came on, then the check engine. Scan code was P0304. Misfire on cylinder 4. I changed ignition coil 4, set of spark plugs. It was still misfiring on 4. I had spark plugs on 4 changed. This still did not fix it. The person who changed the spark plugs let me know my lifter/cam was bad. I scheduled with Dodge and they diagnosed it with a blown head gasket. The service rep said the blown head gasket was my fault, however after asking the mechanic said there was no code for over heating or any of that, just the misfire.