The outer aluminum shell makes this perfect for Jeeps, Broncos, and other off-road applications. For many street applications aftermarket exhaust systems can relocate converters away from factory installed floor pan insulation, using the Cat Armor can keep interior temps cool.
In modern cats with catalytic converters right after the manifold this can lead to serious interior heat or overheat of transmissions. The store will not work correctly in the case when cookies are disabled. Features: A catalytic converter heat shield can reduce interior temperatures and protect transmissions from excessive heat. Find a Dealer. Add to Compare. Do the cleaning over a drip basin or bucket.
Let the sodium hydroxide work for at least 20 to 30 minutes. Once the sodium hydroxide has done its job, thoroughly clean the inside with water. Use a hose with or without a nozzle to clean out the chemicals or pour water in from both ends until the flow is clear. Reinstall the converter and clean up the mess. An inexpensive solution is to add lacquer thinner to your fuel tank to clean the converter. To an almost empty, or empty gas tank, pour in a gallon of lacquer thinner and then pump in 10 gallons of gasoline.
The engine needs to work at rpm or higher for 50 to 70 miles 30 to 40 minutes of that distance. The engine workout and cleaning should remove residue blockage in the converter and engine, so you should notice an improvement in performance and efficiency.
Additionally, the rattle should be gone too. If the shield becomes loose, it will rattle and can fall off or even get stones trapped between it and the stainless-steel housing to produce more noise. It is best to tighten or replace the bolts if possible.
You may need to use penetrating oil to loosen the bolts, but take care not to break the metal flange where the bolts go through. Removing the bolts allows you to clean the inside face of the shield so it is shiny and reflective, and to do the same with the stainless-steel converter housing. High-grit sandpaper can help brighten the metal too. Bluing of the metal is often a sign of excessive heat which can signify a blockage in the converter chambers.
Reattach the shield and use anti-seize on the bolts. Check the torque settings so the bolts are properly tightened. If the welded bolt flanges have broken off, you may be able to find a replacement heat shield. Alternatively, use a galvanized strap clamp to secure it in place.
Cataclean is legal in all 50 states and can be used in gasoline or diesel engines, and even hybrid ones, but not in 2-stroke engines or those using a gas-oil blend. When your vehicle is down to about 4 gallons of fuel, add a 16oz bottle of Cataclean to the tank. Just peel off the seal and pour it in. Go for a 15 minute or more drive to get the cleaner into the engine and converter.
Fuel efficiency and engine performance should improve, and rattle caused by residue blockage should cease. For the best results, add Cataclean every 3 months. For fuel-injected engines, run until the intake is warm and then shut the engine off. Remove the intake boot from the throttle and place the Hook Guide and Cleaning Tube into the throttle body.
Replace the boot over the throttle body and Hook Guide. Have a helper set the parking brake and start the engine. Leaving the vehicle in park, rev it up and hold steady at rpm.
Attach the tube to the spray canister and squirt until empty — about 7 minutes. When the canister is empty, shut the engine off, remove the boot, Hook, and Tube, and then reattach the boot. Let the engine sit for 10 minutes, and then restart and run for 10 more minutes, revving the engine periodically to burn off any stubborn residue.
For carbureted engines, run until the intake is warm and then turn off. Remove the air filter and restart the engine. Place the end of the injector Tube in the carburetor throat and squirt 2 to 4oz in short bursts to avoid stalling, followed by a long burst before turning the engine off.
Let sit for 10 minutes, and then run for another 10 or more minutes. Sea Foam SS14 can also be used for engine fogging too. Use of the foam should improve emissions, performance, and mileage, plus quiet converter rattle caused by residue buildup. If the rattle, performance, and emissions problems persist, the catalytic converter may be suffering from greater damage than residue blockage.
Catalytic converter rattle caused by fractured or broken honeycomb monolith should be replaced before expensive engine damage occurs. Although there are aftermarket and OEE converters available, it is recommended that the replacement be an OEM product. Always make sure the new converter matches the old one, and the emission standards for your vehicle. With tools, some skills, and time it is possible to replace a converter yourself or have a shop do it for you.
Ground to chassis clearance is often limited, so safely raise, block, and support the vehicle. Let the exhaust system cool before working on it. Spray penetrating oil on nuts and bolts that will need to be removed and to the threads of the oxygen sensors, and let sit for 4 to 12 hours. Wearing safety goggles or other eye protection, move under and disconnect the wires from the oxygen sensors. Either remove the two sensors while the converter is still attached or wait until it is removed.
Unbolt the heat shield and remove, and then unfasten clamps, bolts, fasteners, and hangers that hold the converter in place. Converters connected with gasket flanges may need to be gently pried apart and the gasket removed with the converter. Those that are welded into place need to be cut free. If parts break off or are stubborn, you may need to transfer the replacement job to a professional. If everything works well, clean the connecting flanges and gasket surfaces, and prepare to install the replacement.
Apply anti-seize to the oxygen sensor threads, hand tighten them into place, and then torque them to the correct specifications. Place the gasket into the flange between the manifold and converter, and loosely secure the connection bolts. Repeat the gasket process at the exhaust pipe end of the converter.
Install the heat shield and then fully tighten and torque all bolts to the specs. Replace the oxygen sensor wires and lower the vehicle to the ground. With the car back on the ground, clear diagnostic error codes. Turn on the engine and let idle for a minute or two, and then rev slightly to get to its normal operating temp. Once warmed, let it idle for 5 minutes before increasing to rpm for 2 minutes before shutting off and letting it cool.
There should be no more catalytic converter rattle. Depending on driving habits, the environment, fuel, and maintenance, catalytic converters can easily last 10 years, , miles, or as long as the vehicle. The longer and hotter the converter runs, the better for it and the engine.
Good maintenance practices and engine care means being proactive at preventative maintenance and addressing problems before they become major expenses. Most people call this a pinging or rattling sound. A chugging noise could mean a blockage in the exhaust system. If you hear rattling under the car it could mean that the exhaust system has become misaligned.
If you can hear a loud metallic vibration, it usually means that something is touching the exhaust pipe or that a clamp, support bracket or mounting is loose. As Kevin pointed out, it could run more efficiently without it. The catalytic converter builds up back pressure in your exhaust system. If you eliminate it, then your engine will not have to work so hard to push exhaust out of the cylinders.
We do recommend that you replace the heat shield , Liz. Just not with these guys. The reason the heat shield is there is to keep your car from either catching fire or setting something else on fire if your catalytic converter overheats. Catalytic converters run very hot, even when they're working properly. Ray: However, we know there are lots of people who choose not to replace heat shields.
If you can hear a kind of rattling sound as you drive along, this usually means that a bracket holding part of the exhaust system in place has become loose and is no longer holding things in place properly.
These shields work by covering a large rounded surface with compounds that, when superheated during re-entry, burn off. This dissipates the heat as the material is burnt away. A gassy barrier forms that further insulates from heat.
TOM: On top, the heat shield prevents the heat of the exhaust from going upward, toward the floor of your car. Do I need a heat shield on my catalytic converter? Category: automotive auto parts. Rule of thumb: If the manufacturer put it in, it's needed. Not only can the catalytic converter's heat warm up the interior of the car, it can cause a fire if you park on dry grass or leaves.
What noise does a loose heat shield make? How can I prevent my catalytic converter from being stolen? Can you fix a rattling catalytic converter? Stop the Rattles.
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