Partially removing the coolant expansion tank

WARNING: Hot surfaces.
Risk of burning!

Perform all work only on components that have cooled down.

NOTE: RISK OF DAMAGE
Injectors contaminated with coolant.
Damage to and failure of injectors that were coated with coolant for an extended period.

Covering injectors with suitable auxiliary materials before testing or topping up the coolant is mandatory.
Covering injectors with suitable auxiliary materials before working on the cooling system in the area of the injectors is mandatory.
If necessary, draw off all of the coolant from the coolant expansion tank.
Always clean injectors or injector shafts contaminated with coolant (e.g. with compressed air).

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Loosen screws (1).
Unlock plug connection (2) and disconnect.

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Prepare a standard waterproof rubber mat (1).

Letter:	Dimension in cm
A	32.00
B	52.00

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Unclamp the coolant hoses with clamping pliers (3).
Raise coolant expansion tank (2).
Position the rubber mat (1) between the expansion tank and the cylinder head cover.
Unclip the fuel lines in area (4) from expansion tank (2).

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Ensure that the rubber mat (2) covers the areas between expansion tank (1) and the cylinder head cover in the area of injector shafts (3).

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Unlock and disconnect coolant line connections (4).
Ensure that radiator cap (2) is sealed.
Ensure that the fuel lines are unclipped in area (3).
Unlock and disconnect coolant lines (1).

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Seal the connections to the coolant expansion tank with seal plugs (1) part number 17 12 8 515 062.

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Set coolant expansion tank (1) aside.

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NOTE:
RISK OF DAMAGE
Injectors contaminated with coolant.
Damage to and failure of injectors that were coated with coolant for an extended period.
- Covering injectors with suitable auxiliary materials before testing or topping up the coolant is mandatory.
- Covering injectors with suitable auxiliary materials before working on the cooling system in the area of the injectors is mandatory.
- If necessary, draw off all of the coolant from the coolant expansion tank.
- Always clean injectors or injector shafts contaminated with coolant (e.g. with compressed air).
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CAUTION:
Swirling dirt particles caused by compressed air.
Injury hazard!
- Collect dirt particles, e.g. when blowing out, use cloth to do so.
- Wear safety goggles.
CAUTION:
Materials harmful to health.
Contact with fluids harmful to health!
- Note and follow safety instructions on containers.
- Conduct all work in appropriate personal protective equipment only.
Check the injector shafts for coolant residues (1).
If there are coolant residues (1) in the injector shaft: Clean the injector shafts with an air gun (2).