Toyota 4Runner Catalytic Converter
Best Maintenance Practices for the Toyota 4Runner Catalytic Converter
The catalytic converter of your Toyota 4Runner is designed in such a way that the only time you'll do any tinkering is when it breaks down due to wear. And the best way to delay the wearing out of your catcon is to provide it with regular maintenance. Toyota 4Runner catalytic converter maintenance can be quite simple, as it generally revolves around responsible driving practices and constant monitoring. And to help you get started, here are the best practices on how to take care of your SUV's catalytic converters:
- Don't let the engine overheat.
An overheating engine can do more than just shorten its own lifespan. Misfires and premature detonation caused by running the engine at higher-than-normal temperatures will melt the ceramic substrate and matting inside the converter. So once the temp indicator in your dashboard hits the high notes, let the engine cool down immediately. If you find your SUV running hot constantly especially when idling, have the engine and the cooling system checked by a mechanic.
- Replace the engine oil on a regular basis.
Engine oil tends to get foul over time, and when this happens it will cause the valves and piston rings to wear down and allow oil to seep through. The oil will eventually reach the catalytic converter, destroying the catalyst and causing a thick, bluish smoke to come out of the exhaust pipe. The replacement interval of the engine oil in your 4Runner depends on the brand and viscosity of the oil, so make sure to refer to its container for instructions. In addition, if you suspect the engine valves and pistons are leaking oil, have the engine undergo a compression or leak test for a proper diagnosis.
- Keep silicone sealant away.
Silicone sealant is normally used to seal the exhaust manifolds and headers, which tends to burn up when exposed to high temperatures. When this happens, the silicone turns into gas that coats the oxygen sensor, resulting in a condition called "outgassing", which can cause the converter to overheat. To avoid this, do not use silicone sealant or other silicone-based products around the exhaust side of the engine.