If you're referring to The "Cowling" on and airplane, it's the outside of the engine Metal Case) that protects it from the elements and makes the engine aerodynamic. It also facilitates air-flow into the intake.
The cowl panel on an automobile/truck is the area below the windshield.
on the cowl ... where else
The cowl is the black panel in front of / below the windshield - the wiper arms poke through it. See "Related Questions" below for more
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A car has many panels such as a door panel, a header panel, a rocker panel, cowl panel, need more info to answer that Q.
removetheoldputnewon
To remove the cowl on a 2007 Mustang, first, ensure the hood is open and then remove the windshield wiper arms by loosening their nuts and lifting them off. Next, unscrew the cowl panel by removing the screws and clips securing it to the windshield and the body. Carefully lift the cowl panel away from the windshield, taking care not to damage the weather stripping or any attached components. Finally, set the cowl aside for access to the area underneath.
That would be the panel between the bottom of the windshield and the rear of the engine compartment hood.
To change the rear spark plugs the cowl panel must first be removed. Take off the wiper blades, then with the hood open remove the cowl panel. The plugs are fairly easy to get to once the panel is removed.
To reseal the screen under the cowl of a 2003 Town Car, first, remove any screws or clips securing the cowl panel and carefully lift it off. Clean the surface and any old sealant from the screen and cowl area. Apply a suitable weather-resistant sealant or gasket material along the edges of the screen, then reattach the cowl panel, ensuring it fits snugly. Finally, secure it with the screws or clips you previously removed.
It is called the 'Scuttle panel' or the cowl.
Cowl panel
You will need to raise up the driver side wiper once the hood is opened.On the freestar the cowl is being held on by pushpins rather than screws on the top cowl cover.On the bottom cowl cover there are screws on the right and left, but the windshield wiper mechanism is also attached to the underside of the lower cowl panel on the drivers side, so you will need to disconnect the wiper hose and electrical connector to completely remove the cowl; leave the wiper assembly attached to the cowl.