Coolant: Service and Repair

17 00 005 - Draining and adding coolant (N52, N52K, N51, N53)





Special tools required:
- 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit






Warning!
Danger of scalding!

These tasks on the cooling system should only be carried out on an engine that has cooled down!





Important!
Lifetime coolant filling:

If removing radiator, oil-coolant heat exchanger or transmission oil cooler, do not reuse drained coolant!

Installation Note:
Use only recommended coolant.

Observe mixture ratio (antifreeze/water).





Protective measures/rules of conduct:

- Wear protective goggles
- Wear protective gloves
- Observe national/country-specific regulations






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

Danger of injury!

Catch and dispose of drained coolant in drip tray (1) and if necessary special tool 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit (universal hydraulic lifter).

Recycling:
Observe country-specific waste-disposal regulations.





Necessary preliminary tasks:
- Follow instructions for working on cooling system 17 00 ... Instructions For Working on Cooling System
- Remove front underbody protection Removing and Installing/Replacing Front Underbody Protection





Draining coolant:

Open cap (1) on coolant expansion tank (2).

Installation Note:
Close cap (1) until the arrow marks line up.





Unlock lugs (1) on front axle carrier and remove radiator cover (2) in direction of arrow.





If fitted, release drain plugs (1) on radiator at bottom. On coolant radiators which do not have a drain plug, remove coolant hose.

Drain, catch and dispose of coolant.

Installation Note:
Replace sealing rings.

Tightening torque 17 11 2AZ [1][2]17 11 Radiator and Mounting Parts.





Unfasten and detach coolant hose (1) from thermostat housing.

Drain, catch and dispose of coolant.





Adding coolant:

Use only recommended coolant.

Observe mixture ratio.

Observe filling capacities.

Installation Note:
Observe venting instructions without fail.

Fill and vent cooling system 17 00 039 Venting Cooling System and Checking For Water Leaks.

Check cooling system for leaks Component Tests and General Diagnostics.