Nissan Pathfinder R50 (2nd generation): A/C Condenser Replacement

Part numbers are from the manufacturer's original catalogue. Check them against your VIN before ordering.

• Socket set and ratchet
• 10-12 mm socket wrenches
• screwdrivers
• plastic clip removal tools
• caps/plugs for open lines
• refrigerant recovery and recharge machine
• vacuum pump
• manifold gauge set
• leak detector

1. Park the vehicle on level ground, shut off the engine, and disconnect the negative battery terminal. First confirm that the leak really is in the condenser: look for oily residue mixed with dirt on the fins or at the tube connections.
2. Recover the refrigerant from the system with the recovery machine. Note the amount of refrigerant recovered and the amount of oil that came out, as you will need these to top up the system.
3. Remove the upper plastic radiator cover and the air duct. Then remove the radiator grille and, if needed, the front bumper if access to the condenser mounts is blocked. Release the clips with plastic clip removal tools and do not break them.
4. If it is in the way, move aside or remove the cooling fan with its shroud. If you remove it, disconnect the electric fan connector first.
5. Undo the bolts or nuts of the two lines on the condenser: the discharge line (from the compressor) and the liquid line (to the receiver-drier/evaporator). Immediately cap the open tubes with plugs so that moisture and dirt do not get into the system.
6. Remove the condenser mounting bolts at the upper bracket of the radiator support or at the side brackets. Lift the condenser upward and carefully pull it out, taking care not to damage the radiator fins.
7. If the receiver-drier is mounted on the condenser or next to it, replace it together with the condenser: the drier absorbs moisture every time the system is opened. First transfer the lower rubber mounts and bushings to the new condenser.
8. If the system is contaminated with compressor debris (the compressor has failed) or you need to remove old oil, flush the lines and check the compressor. Add about 30-50 mL of A/C oil to the new condenser. The exact amount is given in the A/C service manual.
9. Install the new condenser in reverse order. Lubricate the new O-rings with A/C oil. Tighten the line connections lightly, about 5-10 N·m (4-7 lb-ft). Do not overtighten: the tubes are aluminum, and the threads and flanges are easily damaged. Tighten the condenser mounting bolts without excessive force, about 5-10 N·m (4-7 lb-ft).
10. Reassemble the fan, air duct, grille, bumper, and cover. Reconnect the connectors. Reconnect the negative battery terminal.
11. Connect the machine and evacuate the system for at least 30-45 minutes. Then hold the vacuum for 10-15 minutes: if the gauge needle moves back, there is a leak, so find it before charging.
12. Charge with R134a by weight, as specified on the label under the hood. Start the engine, turn the A/C to maximum, and compare the gauge pressures with the specification. Check all connections with a leak detector. Make sure the fan turns on when the A/C is running.

• Do not pour refrigerant or A/C system oil onto the ground
• Wear gloves and safety glasses: liquid refrigerant causes frostbite
• If you do not have a recovery and evacuation machine, do not start the job yourself, and take the car to a repair shop instead
• Without evacuation, moisture will get into the system and quickly destroy the compressor