Procedures

17 .. ... Venting cooling system for intercooler (N63 hybrid)

Special tools required:





Warning!
High-voltage system - danger to life!

Warning!
The following points must be strictly observed prior to starting work:

^ De-energise the high-voltage system
^ Observe safety instructions for working with hybrid vehicles.





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 expansion tank.
Electric coolant pump!
Follow instructions for working on cooling system.

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!
Risk of slipping due to coolant on the floor.
Risk of injury!

Catch and dispose of drained coolant in drip tray (1) and if necessary special tool 00 2 030 (universal hydraulic lifting equipment).

Recycling:
Observe country-specific waste-disposal regulations.





Important!
The following venting procedure is necessary when a part is replaced in the cooling system or when the cooling system is refilled.





Add coolant
Coolant is added at intercooler expansion tank.

Use only approved coolant.

Observe mixture ratio.





Venting cooling system:

Note:
Do not leave the coolant expansion tank cap open during the venting procedure.
1. Top up coolant up to upper edge of expansion tank.
2. Connect battery charger.
3. Switch the ignition on.
4. Press accelerator pedal for 10 seconds to floor. Engine must not be started.
5. The bleeding procedure was started by pressing the accelerator pedal.
6. During the first 2 min. top up coolant immediately after level has dropped up to upper edge of expansion tank.
7. After approx. 2 min, coolant is only up to MAX. mark.
8. After approx. 4 min, the filling procedure ends. The fluid level in the expansion tank rises to approx. 1.5 cm over MAX. This corresponds to a volume of 150 ml and is correct this way.
9. Check cooling system for leaks.
10. Close expansion tank.
11. If the venting procedure has to be carried out again, allow DME to drop completely (ignition key removed for approx. 3 minutes), then repeat from Point 4.