17 00 009 Checking cooling system for water leaks (S85)

WARNING: This page is about a different car, the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2007 BMW M5, and 2006 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 2 030
17 0 101
17 0 113
17 0 114

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

Protective measures/rules of conduct:

Wear protective goggles.
Wear protective gloves.
Observe national/country-specific regulations.

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.

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 Drop In Cooling System Using Special Tools (17 0 101/17 0 113)

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.