Anybody use the door panel insulator from Willcox, wondering how well it works, makes a differance in noise level. I've got my drivers door apart to replace the regulator & motor assy. and thoughts on them??

 

I have them on mine and they do make a difference in noise. Maybe not a big difference but noticeable. When you shut the door it sounds a lot more solid. They are a bit of a PITA to install then cover with your door panel but patience is the key.

Good luck!

 

I have them, I couldn't tell the difference.

The ones I have came from Ecklers, not sure they are the same.

 

I have the foil heat barrier, but I gave up trying to fit the door panel over it (even tho the barrier is fairly thin). With the all trimming that is required to get the panel to fit on the door properly, I cant see how it can be very effective - most of it needed cutting away. And I still couldnt get the panel to fit over it (to my liking) so I gave up.

I wonder if the molded-foam insulators that MAD/Ecklers/etal all sell might be a better idea?

 

I tried to find the insulators on Willcoxs' website, but could not. I wanted to compare them to what I bought before commenting.

Without a reference to see if you're thinking of the same part, I will say the ones I bought were considered the same part as was added to later model years. So, GM added them for the LT cars because they thought it made a difference.

I agree. I've had my panels off more than once. The insulators were installed after their first removal. I've never considered leaving them out as they definitely improve road isolation. By themselves, you won't be bowled over. In conjunction with other insulative efforts, they're worth it.

I have foil insulation under the front carpets, door insulators, insulation behind the rear wheel wells, and undercoating. The difference compared to stock is remarkable. The insulators do make the doors sound more solid when shutting.

 

Go to Willcox, select ALL catagories, select DOOR, their on the 2nd page

 

Yep, that looks the same as mine.

 

Guess I'll give them a try, thanks guy's

 

I just installed these door insulators on my '89 coupe. I think the late model C4's (90~96) came w/them from the factory. Mid-America, Ecklers, and Corvette America all sell them. But Mid-America sells them w/a door quieting kit that includes adhesive felt insulators that mount to the fiberglass door shell for extra sound suppression.

They work pretty well, quieting road noise and when shutting the doors you get a more solid sound and feel. I also replaced the door weatherstripping and outer door window wipes so that may have had something to do with my results.

Installation was pretty straight forward, Mid-America included very good instructions w/pics. You do have to cut X's into the foam to run OEM door panel wiring thru the insulators but no trimming of the insulators is required. I found it was easiest to align the insulators in position and tape them in place w/duct tape in several spots along the top of the fiberglass door shell like a hinge. Now you can flip them up and down to locate where to cut X's for the factory wiring. It was a little hard to remount the door panels after I installed the insulators. I found the two screws that are in the middle of the panel, in the door pull, were very hard to line up as the foam needs to be compressed for these screw holes to line up. I found sitting in the seats while pushing the inner door panels outward with my thighs (I'm tall so I could do this easy) allowed me to line up the screw holes and screw these screws down into the metal inner door frame.

 

 

Yeah, what he said.