I spent about an hour adjusting the engine “hood” for a better and tighter fit, this stopped the whistling sound.
I also called Thor and they sent me a black mesh screen for the grill. Easy to install the screen, remove a few nuts that hold the grill in place, cut the screen to fit in front of the grill and then reinstall. Took about 30 min, really easy.
Dave & Myra
One day your life will flash before your eyes,
make sure it's worth watching!