High pitch Whistling sound.

[SammyC]

I have a 2016 ACE motorhome. I have a high pitch whistling noise coming from the front end seems to only be when its raining. Any thoughts ??

[be happy]

I had the same problem with the whistle only in the rain. There are a few posts about the whistle under normal driving but non during rain. Any way I never found out why or how come it happens only in the rain. Some thought it might be the wheel well causing the problem. So I ended up following the thoughts of the whistle all the time folks. That required getting a different grill from Thor. I called Thor customer service up and trying to explain to them what happens (which was hard) they said they would ship me the replacement grill.

Once the grill arrived I was going to take the original one off and replace with the new style. I realized that I really did not want to start that project. So I took duck tape and taped the edges of the new grill, screwed it (using original grill screws) to the back of the original grill.

Result that during rain my whistle factor has been cut down to almost nothing. I do find alittle whistle around the 50-55 speed but nothing like I used to. Good Luck

[jfreitas]

If your coach has the plastic grill that has the square holes, then that is the cause of the whistle. I had the same issue and when i brought it up to Thor, they were well aware and sent a replacement grill that is kinda like wire mesh.

It is a pretty easy change as it is only a few nuts to remove from inside the hood. Really shouldnt even require a trip to the dealer. Call Thor and they will send a new grill to you.

[SammyC]

Thanks for the info. I will call tomorrow.

[tnedator]

Originally Posted by jfreitas

If your coach has the plastic grill that has the square holes, then that is the cause of the whistle. I had the same issue and when i brought it up to Thor, they were well aware and sent a replacement grill that is kinda like wire mesh.

It is a pretty easy change as it is only a few nuts to remove from inside the hood. Really shouldnt even require a trip to the dealer. Call Thor and they will send a new grill to you.

I have the replacement mesh grill, but it was much thinner than original plastic. I was afraid the original screws might penetrate too far, all the way through the fiberglass.

Any concern here?

[be happy]

When I looked at doing mine, I was going to get shorter screws. I felt the ones that held on the original grill were to long. Thats when I thought I would just put the new grill behind the original.

[SuperD]

I put the new grill in front of the old one, the smaller holes act as a bug screen.