BMW 18407545308 Exchange. Exhaust Manifold With Catalyst

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The catalytic converter operates at very high temperatures, so it's important not to park the vehicle in dry undergrowth, over long grass, or piles of dead leaves after a long run.

To begin the process of removing the intake manifold on a 2.0L engine: Disconnect the negative battery cable. Remove the engine cover, strut tower crossbrace, and sound insulator. Disconnect the wiring harness clips and move the harness out of the way. Remove the PCM control unit. Release the quick-connectors for the fuel tank vent valve. Disconnect the electrical connectors to the fuel tank vent valve and throttle valve. Remove the charge air cooler hose and the intake plenum mounting nuts.

When installing the exhaust manifolds on a 3.0L engine: Apply anti-seize high-temperature grease to the manifold studs. Always replace the gaskets. Tighten the manifold nuts to the specified torque. It's important to work carefully and follow proper procedures during these tasks. If you're not experienced, consider seeking assistance from a professional mechanic or technician.

A well-maintained and well-driven catalytic converter should last between 50,000 and 100,000 miles. If the converter is no longer effective, it must be replaced. It's important to note that the catalytic converter is integral with the exhaust manifold, and they are replaced as a unit.