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.
When replacing and removing components which rely on the corrosion protection effect of the coolant, it is essential to change the coolant. The cooling system must therefore be drained and refilled.
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.
Opening the cooling system while hot can result in air entering the system.
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
- Workshop mode
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
READ NEXT:
Venting And Filling Cooling System With Vacuum Filling Unit
Notes
IMPORTANT: Lifetime coolant filling:
Never reuse used coolant!
When replacing and removing components which rely on the corrosion
protection effect of the coolant, it is essential to change the
Venting Cooling System For Intercooler (N63)
Notes
WARNING: Danger of scalding!
Open sealing cap only after engine has cooled down.
IMPORTANT: Cooling system for intercooler has a separate cooling circuit.
Coolant is added at intercooler expans
Radiator, Expansion Tank, Pipes
CHECKING COOLING SYSTEM FOR WATERTIGHTNESS (N54, N63)
Notes
WARNING: Risk of scalding!
Only perform this repair work after engine has cooled down.
Protective measures/rules of conduct
Wear safety go
SEE MORE:
Auto Start/Stop function
Concept
The Auto Start/Stop function helps save fuel.
The system switches off the engine during a
stop, for instance in traffic congestion or at traffic
lights. Drive-ready state remains switched on.
The engine starts automatically for driving off.
General information
After each engine start using
Wiper system
General information
Do not use the wipers if the windshield is dry, as
this may damage the wiper blades or cause them
to become worn more quickly.
Safety information
Warning
If the wipers start moving in the folded away
state, body parts can be jammed or damage
may occur to parts of the vehicle. Th
