My truck developed a ticking sound which sounds to be in the engine compartment. It sounds sort of like an exhaust leak, but i can't find one that seems severe. You can hear it really well in the cab at 1600 - 2000 rpm. Can't hear it outside the truck, only in the cab with the windows rolled up. This developed after a trip to the dealer to have the fuel and air filters changed. The lift pump was also found to be bad and replaced. Could it be valve problems?
Any other ideas?
Any other ideas?
