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BD Diesel Heat Shields | Wraps

Heat shields are actually metal guards that surround the various pieces of your vehicle’s exhaust system. They are essentially there to “shield” other materials and parts from the excessive heat given off by the exhaust. There are two shields: a top and bottom one. The bottom heat shields are there so that if you park on tall, dry grass or another combustible material, your 600º exhaust won’t set it on fire. This does not happen often, but it can be quite a show when it does. The top heat shield works to prevent the heat of the exhaust from going upward, toward the floor of your car. Depending on what piece of the heat shield becomes missing, it can cause the bushings in your shifter to dry out or even melt the bottom of your shoes to become one with the interior carpet. Since the heat shields are constantly being exposed to a number of elements, they are vulnerable to rusting and breaking loose.

Common symptoms like a very hot hood, burning smell or scraping noises underneath the car (especially when going over bumps) may indicate that you need to replace the heat shield. Heat shielding is very important because it protects the vehicle and its persons from damage due to overheating components. Neglecting heat shielding can cause anything from melted parts to a car that does not run or even an undercarriage fire.

Apart from heat shields, there is also something known as an exhaust heat wrap. There are two main reasons that people wrap their exhaust – for radiant heat control or slight performance gains. On the safety side, heat wrap products are rated to drop under-the-hood temperatures by up to 50%. On the performance side, header wraps are designed to keep the heat inside the heater and contain it, therefore increasing exhaust gas temperatures. A higher exhaust temperature helps with raising speeds and lowering intake temperatures. After all, a cooler air intake system is better for the car performance wise, which is why so many people choose to do that mod first. 

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