BMW 18407545309 Exchange. Exhaust Manifold With Catalyst

You can Select Your Vehicle to check if 18407545309 fits your vehicle.

To remove the intake manifold on a 2.0L engine, start by disconnecting the negative battery cable. Then, 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, and 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. Install the new intake plenum gaskets and tighten the nuts in stages. For a 3.0L engine, remove the fuel injectors and air filter housing. Disconnect the wiring plugs from the throttle body/manifold and release the wiring harness/cables from the retaining clips/bolts. Disconnect the breather hose from the manifold and remove the manifold retaining bolts. Lift the manifold and disconnect the hose on the base of the tank venting valve. Disconnect any hoses or wiring harnesses from the retaining clips on the manifold and support bracket. Remove the manifold from the cylinder head and check the condition of the seals. Replace them if necessary. To remove the exhaust manifolds on a 3.0L engine, raise the front of the vehicle and remove the engine splash shield. Remove the nuts securing the manifold outlets to the exhaust system and disconnect the electrical connectors for the oxygen sensors. Remove the cover over the ignition coils and the coolant expansion tank. Remove the rear and front exhaust manifolds, taking care not to damage the oxygen sensors. Discard the gaskets. When installing the exhaust manifolds, apply anti-seize high-temperature grease to the manifold studs and always replace the gaskets. Tighten the manifold nuts to the specified torque.

The performance of the catalytic converter is monitored by the oxygen sensors. When a change in readings occurs between the upstream and downstream sensors, a trouble code should be set that indicates the catalytic converter is not working efficiently. Take the vehicle to a dealer or other qualified shop for analysis. The catalytic converter is a reliable and simple device which needs no maintenance in itself, but there are some facts an owner should be aware of if the converter is to function properly for its full service life. Always keep the ignition and fuel systems well-maintained in accordance with the manufacturer's schedule. If the engine develops a misfire, do not drive the vehicle at all (or at least as little as possible) until the fault is corrected. DO NOT push- or tow-start the vehicle-this will soak the catalytic converter in unburned fuel, causing it to overheat when the engine does start. DO NOT switch oft the ignition at high engine speeds. DO NOT use fuel or engine oil additives-these may contain substances harmful to the catalytic converter. DO NOT continue to use the vehicle if the engine burns oil to the extent of leaving a visible trail of blue smoke. Remember that the catalytic converter operates at very high temperatures. DO NOT, therefore, park the vehicle in dry undergrowth, over long grass or piles of dead leaves after a long run. Remember that the catalytic converter is FRAGILE - do not strike it with tools during servicing work. In some cases a sulphurous smell (like that of rotten eggs) may be noticed from the exhaust. This is common to many catalytic converter-equipped cars and once the vehicle has covered a few thousand miles, the problem should disappear. The catalytic converter, used on a well-maintained and well-driven vehicle, should last for between 50,000 and 100,000 miles - if the converter is no longer effective, it must be replaced. The catalytic converter is integral with the exhaust manifold, and they are replaced as a unit.

To remove the intake manifold on a 2.0L engine, start by disconnecting the negative battery cable. Then, 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, and 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. Install the new intake plenum gaskets and tighten the nuts in stages. For a 3.0L engine, remove the fuel injectors and air filter housing. Disconnect the wiring plugs from the throttle body/manifold and release the wiring harness/cables from the retaining clips/bolts. Disconnect the breather hose from the manifold and remove the manifold retaining bolts. Lift the manifold and disconnect the hose on the base of the tank venting valve. Disconnect any hoses or wiring harnesses from the retaining clips on the manifold and support bracket. Remove the manifold from the cylinder head and check the condition of the seals. Replace them if necessary. To remove the exhaust manifolds on a 3.0L engine, raise the front of the vehicle and remove the engine splash shield. Remove the nuts securing the manifold outlets to the exhaust system and disconnect the electrical connectors for the oxygen sensors. Remove the cover over the ignition coils and the coolant expansion tank. Remove the rear and front exhaust manifolds, taking care not to damage the oxygen sensors. Discard the gaskets. When installing the exhaust manifolds, apply anti-seize high-temperature grease to the manifold studs and always replace the gaskets. Tighten the manifold nuts to the specified torque.

The performance of the catalytic converter is monitored by the oxygen sensors. When a change in readings occurs between the upstream and downstream sensors, a trouble code is set, indicating that the catalytic converter is not working efficiently.