17 00 009 Checking cooling system for leaks (N62)

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Special tools required:

WARNING:

Danger of scalding!

Only perform this work after engine has cooled down.

Checking for leaks in cooling circuit:

Open cap on coolant expansion tank.

Fit special tool 17 0 002 /17 0 005 .

Build up gauge pressure of 1.5 bar, wait approx. 2 minutes.

Cooling system is leak-free if pressure drop is max. 0.1 bar.

Fig 1: Identifying Special Tool (17 0 002, 17 0 005)

Courtesy of BMW OF NORTH AMERICA, INC.

Checking function of cap:

Detach rubber (1) from special tool 17 0 002 .

Fit special tool 17 0 007 /17 0 008 .

Fig 2: Identifying Special Tool (17 0 002, 17 0 007, 17 0 008)

Courtesy of BMW OF NORTH AMERICA, INC.

Screw cap (1) onto special tool 17 0 007 .

Pressure relief valve must open between 1.65 and 2.2 bar.

Build up pressure with special tool 17 0 002 and watch pressure gauge to ascertain when opening pressure is reached. Note down measured opening pressure.

After a waiting period of approx. 30 seconds, the pressure must no longer drop by more than 0.4 bar below the measured opening pressure.

Fig 3: Identifying Special Tool (17 0 002, 17 0 007, 17 0 008)

Courtesy of BMW OF NORTH AMERICA, INC.