How to replace the A/C compressor?

Hi,

This is a little bit of a job. However, you should be fine doing it. Here are the directions. The attached pics correlate with the directions.

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2003 Lexus IS 300 L6-3.0L (2JZ-GE)
Removal and Installation
Vehicle Heating and Air Conditioning Compressor HVAC Service and Repair Procedures Removal and Installation
REMOVAL AND INSTALLATION
Compressor And Magnetic Clutch

pic1

REMOVAL

1. RUN ENGINE AT IDLE SPEED WITH A/C ON FOR APPROX. 10 MINUTES
2. STOP ENGINE
3. DISCONNECT NEGATIVE (-) TERMINAL CABLE FROM BATTERY
4. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM
5. REMOVE DRIVE BELT

pic 2

6. DISCONNECT DISCHARGE AND SUCTION HOSES
Remove the 2 nuts and disconnect the both hoses.

NOTE: Cap the open fitting immediately to keep moisture or dirt out of the system.

7. REMOVE PS PUMP WITH PRESSURE FEED AND RETURN TUBES STILL CONNECTED

pic 3

a. Disconnect the PS pump connector and PS pump tube clamp.
b. Disconnect the engine wire.

pic 4

c. Remove the 2 PS pump set bolts and slide the PS pump backward.

8. REMOVE COMPRESSOR

pic 5

a. Remove the bolt and PS pump bracket.

pic 6

b. Remove the 3 bolts and compressor bracket.
c. Disconnect the connector.

pic 7

d. Remove the nut and 2 bolts.
e. Using a torx socket (E10), remove the stud bolt and compressor.

INSTALLATION

1. INSTALL COMPRESSOR
a. Install the compressor with the stud bolt.

Torque: 26 N.m (265 kgf.cm, 19 ft.lbf)

b. Install the 2 bolts and nut.

Torque:
Bolt: 52 N.m (530 kgf.cm, 38 ft.lbf)
Nut: 52 N.m (530 kgf.cm, 38 ft.lbf)

c. Connect the connector.

pic 8

d. Install the compressor bracket with the 3 bolts.

Torque:
bolt A: 39 N.m (400 kgf.cm, 29 ft.lbf)
bolt B: 52 N.m (530 kgf.cm, 38 ft.lbf)

e. Install the PS pump bracket with the bolt.

Torque: 52 N.m (530 kgf.cm, 38 ft.lbf)

2. INSTALL PS PUMP
a. Install 2 PS pump set bolt.

Torque: 58 N.m (590 kgf.cm, 43 ft.lbf)

b. Connect the engine wire.
c. Connect the PS pump connector and wire harness clamp.

3. CONNECT DISCHARGE AND SUCTION HOSES
Connect the both hoses with 2 nut.

Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)

NOTE: Hose should be connected immediately after the caps have been removed.

HINT: Lubricate 2 new O-rings with compressor oil and install them to the hoses.

4. INSTALL DRIVE BELT
5. INSPECT DRIVE BELT TENSION
6. CONNECT NEGATIVE (-) TERMINAL CABLE TO BATTERY

7. EVACUATE AIR FROM REFRIGERATION SYSTEM AND CHARGE SYSTEM WITH REFRIGERANT

Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)

8. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints.

9. INSPECT A/C OPERATION

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Here is a link you may find helpful:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

I hope this helps. Let me know if you have other questions.

Take care and God Bless,

Joe