AC Receiver/Drier

This procedure covers the removal and replacement of the AC receiver/drier on a 2017 Maserati Levante 3.0L V6 Twin Turbo, including refrigerant recovery, component replacement, and system recharge.

Warnings

Tools required

Parts

• AC receiver/drier assembly × 1 — Use OEM specification
• AC line O-ring kit × 1 — Use OEM specification
• PAG 46 oil for R-134a system × 1 — Use OEM specification
• R-134a refrigerant × 1 — Approximately 1.5-2.0 lbs

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine to cool completely if recently operated
3. Open hood and secure in upright position
4. Disconnect negative battery terminal and wait 2 minutes for system discharge
5. Locate receiver/drier assembly on right side of engine bay near condenser
6. Have new receiver/drier unpacked but sealed until ready for installation

Procedure

1. 1

   Recover AC refrigerant
   Connect AC recovery machine to service ports on the low and high pressure sides. Follow machine manufacturer's instructions to completely recover all refrigerant from the system. Record the amount of refrigerant and oil recovered for recharge reference. Verify system pressure reaches zero and holds before proceeding.
2. 2

   Remove engine cover
   Remove the plastic engine cover by lifting upward on the rear section to release the rubber grommets. Set cover aside in clean area. This provides better access to the AC lines running to the receiver/drier.
3. 3

   Disconnect AC lines from receiver/drier
   Locate the inlet line (from condenser) and outlet line (to evaporator) connected to the receiver/drier. Using appropriate disconnect tools, carefully separate the quick-connect fittings or loosen threaded fittings. Immediately cap all open ports with clean plugs to prevent moisture and debris entry. Inspect and discard all O-rings.
   ⚠Some residual refrigerant or oil may escape when disconnecting lines. Wear eye protection and work in ventilated area.
4. 4

   Remove receiver/drier mounting bracket
   Locate the mounting bracket bolts securing the receiver/drier to the vehicle body or condenser support. Remove bolts using 13mm socket. Support the receiver/drier with one hand while removing final bolt to prevent it from falling.
   Torque spec

   Receiver Drier Bolts10 Nm (7 lb-ft)
5. 5

   Remove old receiver/drier
   Carefully withdraw the receiver/drier from its mounting location. Note the orientation of inlet and outlet ports for proper installation of replacement. Inspect mounting area for corrosion or debris and clean if necessary. Measure and record amount of oil drained from old receiver/drier.
6. 6

   Prepare new receiver/drier
   Remove new receiver/drier from sealed packaging only when ready to install. Add the appropriate amount of fresh PAG 46 oil through one of the ports (typically 2-3 oz to replace what was in old unit plus any lost during recovery). Install new O-rings on both inlet and outlet ports, lubricating them with thin coat of PAG oil.
   ⚠Do not leave receiver/drier uncapped for more than 15 minutes as desiccant will absorb atmospheric moisture and become saturated.
7. 7

   Install new receiver/drier
   Position new receiver/drier in mounting bracket, ensuring correct orientation with inlet port toward condenser and outlet toward evaporator. Align mounting holes with bracket. Hand-start all mounting bolts before tightening any to ensure proper alignment.
8. 8

   Torque mounting bolts
   Using torque wrench, tighten receiver/drier mounting bolts in cross-pattern to specified torque. Verify receiver/drier is secure and properly oriented before connecting AC lines.
   Torque spec

   Receiver Drier Bolts10 Nm (7 lb-ft)
9. 9

   Reconnect AC lines
   Remove caps from AC line ports. Verify new O-rings are properly seated on receiver/drier ports and lightly lubricated with PAG oil. Connect inlet line from condenser and outlet line to evaporator, ensuring fittings are fully seated. For threaded connections, hand-tighten first, then torque to specification using proper wrench.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
10. 10

    Evacuate AC system
    Connect vacuum pump to AC service ports. Evacuate system to deep vacuum (minimum 29 inches Hg or 500 microns) for at least 30 minutes. Monitor vacuum gauge for 10 minutes after pump stops - vacuum should hold steady, indicating no leaks. If vacuum drops, locate and repair leak before proceeding.
    ℹ️Proper evacuation is critical to remove all moisture from the system. Moisture will contaminate new desiccant and cause corrosion.
11. 11

    Recharge AC system
    Using AC machine, recharge system with manufacturer-specified amount of R-134a refrigerant (refer to underhood label for exact capacity, typically 1.76 lbs). Add refrigerant through low-pressure port first with engine off, then complete charge with engine running and AC on maximum. Monitor pressures throughout charging process.
12. 12

    Leak test system
    With system fully charged, use electronic leak detector or UV dye method to check all connections at receiver/drier and surrounding components. Pay special attention to line fittings just installed. Check static pressures match specifications before starting engine.

Reassembly

1. Reinstall engine cover by aligning rubber grommets with mounting posts and pressing firmly until seated
2. Reconnect negative battery terminal and tighten securely
3. Verify all tools and parts have been removed from engine bay
4. Close hood and clean any refrigerant oil residue from painted surfaces

Verification

• Start engine and turn AC to maximum cold with fan on high speed
• Verify compressor clutch engages within 10-15 seconds
• Check that both low and high side pressures are within normal operating range (low side 25-35 psi, high side 150-250 psi at ambient temperature)
• Confirm cold air is blowing from all dashboard vents with temperature dropping to below 45°F at center vent
• Listen for unusual noises from compressor or expansion valve
• Verify no refrigerant smell in cabin or engine bay
• Allow system to run for 10 minutes and recheck all connections for leaks using leak detector
• Test AC operation through all fan speeds and temperature settings

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