17 00 009 Checking cooling system for water leaks
WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For Special Tool identification, see COOLING SYSTEM - SPECIAL TOOLS - 5-SERIES (E60) .
Special Tools Required:
- 17 0 101
- 17 0 113
- 17 0 114
WARNING:
Danger of scalding! Only perform this work after engine has cooled down.
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.
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.