Replacing my front fenders with a set NOS ones. My originals were completely undercoated. Anyone have any pictures of the back side of fenders and outer aprons with Ford's original sound proofing spray patterns.
I've looked thru assembly manuals and can't find anything.
Thanks
Quote from: FordGT on May 16, 2026, 11:34:46 AMReplacing my front fenders with a set NOS ones. My originals were completely undercoated. Anyone have any pictures of the back side of fenders and outer aprons with Ford's original sound proofing spray patterns.
I've looked thru assembly manuals and can't find anything.
Thanks
The fenders would not be typically be completely covered from the factory. That more describes what post assemblyline undercoating job would look like. Pg 5 of the weld and sealant assembly manual shows some which you may or may not see once installed. The fender was red oxide underneath with body color over spray from doing the edges and wheel opening lip. Keep in mind that the 60's assemblyline spray guns shot a larger volume of paint compared to the modern guns which are much better at minimum overspray. With that said once the fenders were installed with splash shields front and back it was typical for a pass of sealer to go down the rubber edge of the shield where it contacts the fender front and back. The bottom side of the top of the fender may or may not have gotten a single pass of deadener/sealer . The amount and positions of the spray varied from one worker, shift etc. Those are the basic expectations when we judge in concours.
Assembly manuals are not very helpful in details like this that are directly a result of individual workers at that moment on the line. Looking at the multiple assembly manuals across the years they show edge to edge coverage on the inner fender panels and that's just not typical of factory results at any of the plants. Basically based on the pictures and my focus through the years the coverage on the back side of the fenders is a result of the pattern that applier was applying to the inner fender panels, the firewall section and to the splash shields as they had been directed. Patterns or paths were most often a continuous flowing motion with the applicator flowing all the time through the pattern so if the wand was traveling from lets say the lower right to the upper left, once it reached the top and preparing to then travel from the upper right to the lower left on the rear inner fender panel the curve at the top often did include the bottom side of the fender.
On a percentage of the applications one or more of the workers assigned to the task on that shift often choose to make an addition pass over the top surface (bottom of the fender) of the front wheel well. This often started and or ended on the front splash shield area or , on a Mustang the back side of the front valance in over spray, and at the rear onto the rear splash shield and the cowl/firewall section visible in the wheel well. In other examples the worker applying the product followed a different pattern , for example only horizontal patterns on the inner fender panel, so the pattern never reached the upper edges where it was joined with the fender so little or none was applied to that large area in the middle of the fender between the splash shields.
Below is just one example from late in the production year in 67 at San Jose that came off an unrestored Shelby. Though both side often don't match each other in this example they did a pretty good job of looking that way. Areas at the front of the fenders with no sound deadener is due to the front splash shields, now removed, masking the spray from those surfaces during the process.
(https://www.concoursmustang.com/forum/gallery/23/6-160526162805-233701225.jpeg)
(https://www.concoursmustang.com/forum/gallery/23/6-160526162803-23366808.jpeg)
If your interested in the general application of sound deadener in the front wheel well of your car we'll need a finish date at San Jose or the car number so that I can post other unrestored example from possibly same day, week or if all else fails the month.