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Home >> BMW >> 2009 >> X5 35d >> Repair and Diagnosis >> External Pages >> Different car >> Section 630 (Cooling System - Repair (M54)) >> Coolant, Checking Cooling System >> 17 00 009 Checking cooling system for leaks (M54) >> Checking pressure drop in cooling system:

Checking pressure drop in cooling system:

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

Fig 1: Checking Pressure Drop In Cooling System
G03310739Courtesy 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.

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