17 00 009 Checking cooling system for water leaks

Special tools required:

WARNING: Danger of scalding!
Only perform this work after engine has cooled down.

Protective measures/rules of conduct:

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 (universal hydraulic lifter).

Recycling:

Observe country-specific waste-disposal regulations.

Fig 1: Identifying Tray And Special Tool 00 2 030 (Universal Hydraulic Lifter)

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Illustrations show M54:

Checking pressure drop in cooling system:

Open cap on coolant expansion tank. Fit special tools 17 0 101 / 17 0 113.

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

Cooling system is impervious to leaks if pressure drop is max. 0.1 bar.

Fig 2: Checking Pressure In Cooling System

Courtesy of BMW OF NORTH AMERICA, INC.

Checking pressure relief valve in cap:

NOTE: Coolant residue can cause the pressure relief valve in the cap to stick, therefore repeat the check procedure on the cap 2-3 times.

Screw cap (1) onto special tool 17 0 114.

Build up pressure with special tool 17 0 101 (hand pump); observe pressure gauge to ascertain when opening pressure is achieved.

Opening pressure of pressure relief valve, See SPECIFICATIONS .

Fig 3: Identifying Cap And Special Tool 17 0 114

Courtesy of BMW OF NORTH AMERICA, INC.