17 00 009 Checking cooling system for water leaks: Notes

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2006 BMW 325Ci, 2005 BMW 325xi, 2005 BMW 325i, 2005 BMW 325Ci, and 2004 BMW 325xi. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools Required:

NOTE: Foe special tools, refer to COOLING SYSTEM - SPECIAL TOOLS - 325i, 325Ci, 325xi (M54/E46) .

17 0 002
17 0 005
17 0 007
17 0 008

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

Checking Pressure Drop In Cooling System:

Remove cap on expansion tank. Attach special tool 17 0 002 /17 0 005.

Fig 1: Identifying Special Tools 17 0 002 /17 0 005

Courtesy of BMW OF NORTH AMERICA, INC.

Build up gauge pressure of 1.5 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:

Detach rubber (1) from hand pump.

Attach special tool 17 0 007 /17 0 008.

Fig 2: Identifying Special Tools 17 0 007 /17 0 008

Courtesy of BMW OF NORTH AMERICA, INC.

Screw cap (1) onto special tool.

Fig 3: Screwing Cap Onto Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Build up pressure with special tool (hand pump) 17 0 002; observe pressure gauge to ascertain when opening pressure is achieved.

Compare opening pressure of pressure relief valve, refer to OPENING PRESSURE OF PRESSURE RELIEF VALVE .