BMW 7 Series: Instructions For Desiccant Insert Replacement
A desiccant insert that is in a correctly functioning, sealed A/C system does
not have to be changed at regular
service-inspection intervals.
The desiccant bottle or desiccant insert must be replaced in the event of
- the refrigerant being fouled by chips (e.g. mechanical damage to the
compressor due to clamping)
- a leaking A/C system or loss of refrigerant
- the refrigerant circuit being open for a period exceeding 24 hours (e.g.
during a repair)
INSTRUCTIONS FOR OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT
WARNING:
- Avoid contact with refrigerant and refrigerant fluid.
- Follow safety instructions for handling R 134A refrigerant.
- Follow safety information for HANDLING REFRIGERANT FLUID.
IMPORTANT:
I. Part replacement as preliminary work fur further repair work and part
replacement based on gradual leakage
(minor leak, e.g. hairline crack)
Procedure:
- DRAW OFF A/C system, then determine drawn-off refrigerant oil quantity
- Carry out part replacement
- Replace removed refrigerant fluid and additionally top up with new
refrigerant fluid according to
components replaced:
- Compressor: refer to NOTES ON REPLACING COMPRESSOR
- Evaporator: 10 ml
- Capacitor: 20 ml
- Desiccant insert/dryer flask: 20 ml
- Each replaced refrigerant line: 10 ml
- Capacitor with integrated dryer: 40 ml
- Safety pressure switch and seals: no additional refrigerant fluid
- EVACUATE AND FILL A/C system
II. Part replacement due to sudden leak
(major leak, e.g. pipe break due to accident)
Procedure:
- DRAW OFF A/C system, then determine drawn-off refrigerant oil quantity
- Carry out part replacement
- Replace removed refrigerant fluid and additionally top up with new
refrigerant fluid according to
components replaced:
- Compressor: refer to NOTES ON REPLACING COMPRESSOR
- Evaporator: 35 ml
- Capacitor: 35 ml
- Desiccant insert/dryer flask: 55 ml
- Each replaced refrigerant line: 35 ml
- Capacitor with integrated dryer: 55 ml
- Safety pressure switch and seals: no additional refrigerant fluid
- EVACUATE AND FILL A/C system
READ NEXT:
Notes
WARNING: Risk of injury! Refrigerant circuit is under high
pressure! Follow safety instructions for handling R 134A refrigerant.
Avoid contact with refrigerant and refrigerant oil.
Follow saf
Notes
WARNING: Risk of injury!
Refrigerant circuit is under high pressure!
Follow safety instructions for handling R 134A refrigerant.
Avoid contact with refrigerant and refrigerant oil.
Follow safety
Notes
WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Follow safety information for handling R134a tetrafluorethane refrigerant.
Follow SAFETY INFORMATION for handling refrigera
SEE MORE:
Concept
When the systems in the vehicle, e.g., Speed
Limit Info, detect a change of the speed limit
along the route, this new speed value can be applied
for the following systems:
Speed Limiter.
Cruise control.
Active Cruise Control with Stop & Go function
ACC.
The speed value is suggested
Notes
WARNING: Electric fuel pump starts up automatically when door is
opened!
Disconnect BATTERY NEGATIVE TERMINAL (risk of fire due to shortcircuiting
on removal).
Observe warning on cylinder head cover.
WARNING: Carry out installation work on fuel system only with coolant
temperature
below 40Â