11 62 140 Removing and installing, sealing/replacing both exhaust manifolds (S54)

WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.

Remove hose (1) for engine vent.

Remove sealing cap (2).

Remove ignition coil cover.

Fig 1: Removing Hose For Engine Vent And Sealing Cap

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NOTE: The plug housings of the oxygen sensors for cylinders 1 to 3 and 4 to 6 are different.

Unclip plug housing (1) from mounting.

Disconnect plug connections of oxygen sensors.

Fig 2: Unclipping Plug Housing From Mounting

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Feed oxygen sensor cables out of shield plate of exhaust manifold.

Fig 3: Feeding Oxygen Sensor Cables Out Of Shield Plate

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Fig. shows US version.

Remove check valve from cylinder head.

Installation:

Replace the seal and nuts.

Remove exhaust manifold shield plate and A/C system hoses.

Remove engine splash guard.

Remove front exhaust system (front pipes).

NOTE: The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.

Remove oxygen sensors from exhaust manifolds.

NOTE: Exhaust manifolds (1 and 2) cannot be removed individually.

Detach exhaust manifold (1) from cylinder head and place on engine support arm.

Fig 4: Detaching Exhaust Manifold From Cylinder Head

Courtesy of BMW OF NORTH AMERICA, INC.

Detach exhaust manifold (2) from cylinder head.

Feed out exhaust manifolds (1 and 2) together.

Installation:

Clean sealing faces, replace gaskets.

Coat threads with copper paste.

Replace nuts.

Tightening torque, 11 62 1AZ. Refer to 11 62 EXHAUST MANIFOLD .

CAUTION: Ensure cables are exactly routed.

Installation:

Clip cables of oxygen sensors into mounts on shield plate of exhaust manifold.

Fig 5: Clipping Cables Of Oxygen Sensors Into Mounts

Courtesy of BMW OF NORTH AMERICA, INC.