17 00 009 Checking cooling system for leaks (M54, N46, N52)

WARNING: This page is about a different car, the 2010 BMW X3, 2009 BMW X3, 2008 BMW X3, and 2007 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

See 17 COOLING SYSTEM .

17 0 101
17 0 105
17 0 106

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

NOTE: Illustrations feature the E85.

Checking pressure drop in cooling system:

Open cap on coolant expansion tank. Fit special tools 17 0 101 / 17 0 105.

Build up gauge pressure , wait approx. 2 minutes.

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

Fig 1: Special Tool (17 0 105) And (17 0 101)

Courtesy of BMW OF NORTH AMERICA, INC.

Checking pressure relief valve in cap:

Screw cap (1) onto special tool 17 0 106.

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

Compare opening pressure of pressure relief valve.

Fig 2: Special Tool (17 0 106) And (17 0 101)

Courtesy of BMW OF NORTH AMERICA, INC.