Basic information (BMW 3 Series E46)

Chapter 2B includes a description of the work associated with removing the engine-transmission unit (power unit) from the car, and the main types of repair of the cylinder head and block, as well as other engine systems.

This section contains a variety of information, ranging from advice on preparing for repairs to step-by-step descriptions of procedures for disassembling, removing, checking the condition, restoring, assembling and installing internal engine systems and devices.

Beginning with paragraph 5, all instructions assume that the engine has been removed from the vehicle. For information regarding repair work without removing the engine from the vehicle, as well as removal and installation of engine attachments, including those requiring repair, refer to Chapters 2A or 26 and paragraph 5 of this chapter. Skip all preparatory operations described in Chapters 2A or 26 if they have already been performed when the engine is removed from the vehicle.

With the exception of the tightening torques, which are given at the beginning of Chapters 2A and 26, all technical data concerning engine repair are given at the beginning of this chapter.