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Home >> BMW >> 2011 >> 335d >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System - Repair >> 1700 Coolant, checking cooling system >> 1700005 Draining and adding coolant (M57T2)

1700005 Draining and adding coolant (M57T2)

Special tools required 

WARNING: Risk of scalding! 
Only carry out repair work on the cooling system after the engine has cooled down.
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.

Installation note: 

Use only recommended coolant. See COOLING SYSTEM - OPERATING FLUIDS . .

Observe mixture ratio. See COOLING SYSTEM - OPERATING FLUIDS .

Necessary preliminary work 

IMPORTANT: Protect turbocharger against coolant.
Cover turbocharger with suitable auxiliary materials (risk of damage  ).

Protective measures/rules of conduct 

IMPORTANT: For dirt contamination of the cooling system (e.g. by engine oil), the cooling system must be rinsed with water until all dirt contamination is removed!
IMPORTANT: Risk of skidding 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 (universal hydraulic lifting equipment).

Recycling 

Observe country-specific waste disposal regulations.

Fig 1: Lifting Of Drip Tray Using Special Tool (00 2 030)
G05476170Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation note: 

Close the sealing cap (1) until the arrow marks line up.

Fig 2: Identifying Coolant Expansion Tank With Sealing Cap
G06853578Courtesy of BMW OF NORTH AMERICA, INC.

If fitted, release coolant drain plug (1) on radiator. For radiators without coolant drain plug, unlock coolant hose and remove.

Fig 3: Identifying Coolant Drain Plug On Radiator
G06203622Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Risk of damage!
Cover opening on turbocharger without fail.

1 Loosen coolant drain plug (1) on engine block.

Installation note: 

Replace gasket.

Tightening torque 11 11 5AZ .

Fig 4: Identifying Coolant Drain Plug On Engine Block
G06853580Courtesy of BMW OF NORTH AMERICA, INC.

Open the bleeder screw (1).

Fig 5: Identifying Drain Plug
G06853581Courtesy of BMW OF NORTH AMERICA, INC.

Adding coolant 

Use only recommended coolant. COOLING SYSTEM - OPERATING FLUIDS .

Observe CAPACITIES .

Observe mixture ratio. See COOLING SYSTEM - OPERATING FLUIDS .

FILL AND BLEED COOLING SYSTEM 

CHECK COOLING SYSTEM FOR WATERTIGHTNESS 

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