How to Replace an Exhaust Heat Shield
An exhaust heat shield is an important part of your vehicle's engine. This seemingly innocent piece of metal deflects the heat from the exhaust manifold away from any wires and other cables, so they do not overheat or burn. Sometimes, these heat shields become loose and rattle. This will cause frustration in the car owner, as you try to locate the source of this rattle. If you notice that the heat shield is loose, or it has been cracked, you can replace it fairly easily.
Step 1: Disconnect Battery Cable
It is a good habit to disconnect the negative battery cable of your vehicle before doing any type of work on it. This will ensure that it will not start while you have your hands within the engine compartment. Make sure to place the negative cable away from any metal ground, or it will complete the circuit.
Step 2: Remove Throttle Body Air Duct
To get at the exhaust heat shield, you need to remove a few different parts first. This will not only let you get to the heat shield, but also allow you to work easier. The throttle body air duct will need to be removed. It is located on the top of the heat shield, and to the left.
Step 3: Remove Air Breather
Another part that is very easy to remove is the air breather. Make sure to set it aside in a safe area, so that it does not get broken or full of dirt and debris.
Step 4: Unhook Crossover Pipe
Some of the bolts on the exhaust heat shield are in a very tight spot. In order to get at them you need to move some of the pipes in the exhaust. One of these pipes is the crossover pipe, that is to the left of the exhaust manifold. Simply unhooking the pipe and moving it out of the way will be enough.
Step 5: Remove Exhaust Heat Shield
Depending on the type of vehicle you own, you will have a different number of bolts to remove before taking out the heat shield. Make sure to inspect the heat shield first to count the number of bolts. Use a socket, with a long extension, to remove all of the bolts on the heat shield.
Step 6: Install New Exhaust Heat Shield
Once the old heat shield is removed, you will be able to install the new one. Set the 2 on a work bench side by side, and notice any changes in the way that the new one is shaped compared to the old one. You may need to make some bends in the new heat shield, so it will fit properly. Test the fit of the new heat shield. If it fits well, then install the bolts to secure it to the engine.
Step 7: Replace Engine Items
Reconnect the crossover pipe, and replace the air breather and the throttle body air duct. Connect the negative battery terminal again. Start the car, and check to make sure that the heat shield is deflecting the heat away from the top of the engine compartment.