BMW 7 Series: Instructions For Working On Cooling System

WARNING: Danger of scalding! Work on the cooling system should only be carried out when the engine has cooled down.

IMPORTANT: Wear protective gloves and safety goggles.

IMPORTANT: Lifetime coolant filling:

Never reuse used coolant.

In the case of other removal work involving the draining of partial quantities of coolant, replace these quantities which have been drained with new coolant.

IMPORTANT: Open cooling system only when it has cooled down.

This can cause overheating with permanent damage to the engine.

IMPORTANT: You must protect the alternator against contamination before carrying out any work on the cooling circuit.

Cover alternator with suitable materials.

Failure to comply with this procedure may result in an alternator malfunction.

IMPORTANT: Do not fill coolant expansion tank over MAX level as overfilling will cause the coolant to overflow. This may give rise to traces of residual coolant on the expansion tank or in the engine compartment and wrongly suggest possible leakages.

Recycling

Catch and dispose of drained coolant.

Observe country-specific waste-disposal regulations.

NOTE: To disconnect coolant hoses, use commercially available disconnect tools such as HAZET brand tools (see table).

HAZET TOOL DESCRIPTION CHART

Fig. 8: Identifying Disconnect Tools

NOTE: Tightening torque, hose clamps 17 00 1AZ.

Fig. 9: Disconnecting Coolant Hose

Instructions for disassembly/assembly of coolant hose quick-connect couplings

Disassembly of quick-connect coupling

Pull out lock (1) and (2). Pull off hose.

Fig. 10: Disassembling Quick-Connect Coupling

Installation

Check O-rings (1).

Do not coat O-rings (1) with anti-seize agent.

Fig. 11: Identifying O-rings

Assembly of quick-connect coupling

Press in lock (1) before installing fast-release coupling.

Push on hose.

Quick-connect coupling must clearly snap audibly into place.

Fig. 12: Assembling Quick-Connect Coupling

SAFETY INFORMATION FOR WORKING ON VEHICLES WITH AUTOMATIC ENGINE START-STOP FUNCTION (MSA)

WARNING: If the engine hood/bonnet contact is pulled upwards (workshop mode), the information "switch closed" is output. The automatic engine start-stop function is active.

An automatic engine start is possible.

Observe safety precautions when working on MSA vehicles

Before carrying out practical work on the engine, always ensure that the MSA functionality is deactivated so as to prevent automatic engine starting while work is being carried out in the engine compartment.

MSA function is deactivated by

• Deactivate MSA by means of button (1) in passenger compartment
• Open seat belt buckle and driver's door

Fig. 13: Identifying Automatic Engine Start/Stop Switch (MSA)

• Open engine bonnet/hood and ensure that engine hood/bonnet contact is not in workshop mode
  • Workshop mode
    A = 10 mm
  • Basic setting (engine hood/bonnet open) B = 7 mm

To make sure that the engine hood/bonnet contact is at the basic setting, if necessary press the hood/bonnet contact up to the limit position before starting work and slowly release.

Fig. 14: Identifying Engine Hood/Bonnet Basic Setting And Workshop Mode

When working with diagnosis tools

• Observe instructions in diagnosis tool

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