BMW X5 Owners & Service Manuals

BMW X5: Leak-Testing Evaporator

Special tools required:

Necessary preliminary tasks:

Replace sealing rings (1) and coat with refrigerant oil.

AC Housing-evaporator
Fig. 90: Identifying Sealing Rings

Mount special tool 64 5 108 and retainer (1) with screws of expansion valve.

Tightening torque.

AC Housing-evaporator
Fig. 91: Identifying Special Tool (64 5 108)

Connect special tool 64 5 104 to special tool 64 5 108.

AC Housing-evaporator
Fig. 92: Identifying Special Tool (64 5 104 And 64 5 108)

IMPORTANT: Risk of damage: Use only nitrogen pressure bottles with pressure reducers for leak-testing.

Pressurize evaporator to 15 bar slowly only. Excessively fast pressurization and pressures in excess of 20 bar may cause damage to the evaporator.

Connect nitrogen pressure bottle with pressure reducer to pressure gauge and then connect to special tool 64 5 104 (connecting hose).


Apply test pressure of 15 bar slowly and close nitrogen pressure bottle.

Check leak-tightness of testing apparatus and of connection to refrigerant line.

Set test pressure of 15 bar is only permitted to drop by 2 bar to 13 bar over a test period of 2 hours.

If the pressure loss is greater than 2 bar, this indicates that there is a leak in the evaporator unit.

After installation:


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