I have an 05 F-150 Supercrew. Bought it in 08 still in warranty--no issues, but as the miles wore on, a niggling rattle began to wear on my nerves. It felt and sounded like it was in the cowl area--both the rubber ends of the cowl are long gone. I've used body putty, silicone, even pennies to stop anything I could find that was rattling. It was maddening! It started out as only rattling when there was a strong cross wind, then as the miles wore on, it took less and less cross wind. The hood on this truck has always vibrated and shook but I never could isolate the rattle. Dealer just shook his head. I couldn't replicate it even with a leaf blower!



Then......last week with 4-6 inches of sleet and snow piled up on the truck, I went for a drive. When I hit the brakes a huge chunk of ice slides off the roof of the truck, crashes down on the hood and shears about 1/3 of my oem bug shield off. Made me sick! I waited until the weather got better and took the snaggle-tooth remainder off and went shopping for a new one. Didn't find one in stock locally and decided to go without for a while. Guess what?



NO MORE RATTLE! I can't believe how much quieter the whole truck is! Hood is rock still now at speed and the March cross-wind is howling.....still no rattle! Funny thing is I checked the bug shield several times, but it was tight as a tick. The bug shield was causing the rattle by changing the air flow over the front of the truck.



I'm still in shock........



Lesson learned!

 

Strange. Glad you found it. I have an AVS bug shield that I've had for over 8 years and no such rattle.

 

Glad you found it. I had a rattle in the cowl. Wrapped some foam around one of the hook type hold downs and that fixed it.

 

Doesn't surprise me it was rattling. Stuff like that tends to have lots of rattles