Spikey Jumbo Washer For Wrangler Heat Shield Foil

thingiverse

This is a massive, spiked washer for securing the heat shield foil to the subframe of a Wrangler JK (and other vehicles). It sits under the standard 10mm bolt and provides significantly more surface area (and spikes!) for holding the foil firmly in place. Why does it help? When off-roading, rocks, tree branches, and other obstacles can get caught on the heat shield foil and tear it out from under the small 10mm bolts that hold it to the subframe. Even after pushing it back into position, it can still bend again and end up rubbing against the front driveshaft or other components. This washer adds a lot more surface area to the tiny stock metal washers. It also features spikes to pin down the foil, and flexes slightly to conform to the curved frame surface. Printing requirements: This will be attached to the underside of your vehicle, possibly close to the exhaust pipe. Print it out of the toughest material you can find, with solid infill. I used a high-quality glass-filled nylon (Zytel 3D12G30FL BK309), which has held up well for several weeks. Don't print it in PLA; you'll have a bad experience. Installation instructions: Remove the standard 10mm bolt and screw it through the oversized washer. Add an additional metal washer to the front side (important, since it sandwiches the plastic washer between two metal washers and allows it to be tightened down). Push the heat shield foil back into position and over the screw hole, then screw the washer with bolt back in. Tighten it down firmly.