17 00 010 Checking for leaks between cooling system and combustion chamber
WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.
Check for leaks with CO leak tester in accordance with Manufacturers Operating Manual.
Fig 1: Checking For Leaks With CO Leak Tester
Courtesy of BMW OF NORTH AMERICA, INC.
M43
CAUTION:
Do not check for leaks while engine is running. Engine will overheat!