BMW B46TU Reference Manual page 21

B46TU￿/￿B48TU￿Engines
2.￿Engine￿Mechanical
In￿case￿of￿incorrect￿assembly￿of￿the￿drive￿belt,￿the￿coolant￿flow￿through￿the￿coolant￿pump￿is￿either
insufficient￿or￿non-existent;￿there￿is￿thus￿a￿lack￿of￿cooling.￿There￿is￿a￿risk￿of￿damage￿to￿engine
components￿and￿engine￿damage￿
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