[ Cowl repair ]  
V-twin power: Suzuki SV650S

Cowl: a four-letter word for Mustang owners.

In the beginning, fresh air came in through these vents ahead of the windshield and through openings on the right and left and onto the feet of the driver and passenger to keep them comfortable on hot days. More or less.

But a few years later, water from rain and car washing, along with pinestraw, leaves and other gunk cnspired to rust out the cowls. Ford never painted them at the facotry, so their bare metal skins had no chance.

The accepted repair is to drill out about 200 spot welds, remove the entire cowl, cut out the rusted metal, weld in new metal, and reweld the cowl panel. My mechanic and bodywork expert, Larry Council, wanted a simpler way: Cut off just the ends of the cowl panel, make the repair, then weld the ends back on. It worked.

Regardless of how you do the repair, you need to precisely fit the repair panels to the opening to ensure as tight a fit as possible. Also, make sure to apply seam sealer to the underside of the cowl repair panels, getting to them from under the dash.

These cowl "hats" had already rusted out and were just sitting there.
We cut out the remaining rusted areas on each side.

Here's a repair panel welded in. These panels may need a bit of cutting and shaping to get a tight fit.

Below are photos of fresh paint on the repair panels and the top of the cowl panels welded and filled.
 

The tops of the panels are now primed.

Also be sure to apply seam sealer to the underside of the repair.

One final note: These cars are old, and rusted cowls might not be the only area leaking. Water can work its way in from the windshield opening, the holes in the cowl where the wiper arms attach and the holes where the rubber seals the hood to the cowl. So even after you repair the cowls, you might still be chasing leaks for years. But they won't be quite so bad.

Altogether, this job took about eight hours. Here are the material costs:

Part Vendor
Cost
Cowl repair panel, left Mustangs Unlimited
$46.95
Cowl repair panel right Mustangs Unlimited
$46.95
3M brushable gray seam sealer National Parts Depot
$23.50
Total   $117.40
Boyd's Mustang
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Last updated Dec. 31, 2004
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