I was driving the 02 L in the morning when I heard a pop sound and then a lot of louder popping sounds. I parked the truck in the parking lot I was in and had it towed. They said they need to pull the head at the Ford dealership and get it checked out. To do this they say they have to drop the engine out of the truck, have the head magnafluxed and all that crap and then sent to the machine shop for the repair. Total cost 4300 bucks. I am wondering if I can just pull the heads myself in the engine bay of the truck and swap on some ported 2v heads and resolve the problem altogether and have some good heads to go with the rest of the setup. Mai already did the blower swap so I know together we can do the work on the heads ourselves and come out paying around half for what ford wants to do.