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Home >> BMW >> 2021 >> M3 Base, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System -- Repair M3 (G80) >> 17 11 Radiator, Radiator Fan >> 17 11 103 Removing and installing/replacing the coolant expansion tank for the low-temperature coolant circuit (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS) >> Installing the coolant expansion tank for the low-temperature coolant circuit

Installing the coolant expansion tank for the low-temperature coolant circuit

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
NOTE: TECHNICAL INFORMATION 
Immobilization period-long fill of coolant! 
Do not 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 emptied and refilled
In the case of other removal work involving the draining of part quantities of coolant, the coolant level must be topped up with new coolant
G14903266Courtesy of BMW OF NORTH AMERICA, INC.

The coolant line (1) must engage audibly

G14903264Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Coolant expansion tank on the low-temperature coolant circuit to charge air cooler 
M6x18 Tightening torque  5.3 Nm
G14903263Courtesy of BMW OF NORTH AMERICA, INC.

Connect and lock the coolant line (1) on the coolant expansion tank (2) of the low-temperature coolant circuit

The coolant line (1) must engage audibly

G14903271Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work