Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS1997ES 300 V6-3.0L (1MZ-FE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGSERVICE AND REPAIRSYSTEM CHARGING
1997 Lexus ES 300 V6-3.0L (1MZ-FE)
System Charging
1997 Lexus ES 300 V6-3.0L (1MZ-FE)SECTION System Charging
CHARGING
1. INSTALL CHARGING CYLINDER
HINT: When handling the charging cylinder, always follow the directions given in the instruction manual.
a. Charge the proper amount of refrigerant into the charging cylinder.
b. Connect the center hose to the charging cylinder.
CAUTION: Do not open both high and low hand valves of manifold gauge set.
c. Open the valve of charging cylinder.
d. Press the valve core on the side of manifold gauge and expel the air inside of the center hose.
2. INSPECT REFRIGERATION SYSTEM FOR LEAKS
a. Open the high pressure hand valve and charge refrigerant.
b. When the low pressure gauge indicates 98 kPa (1 kgf/sq.cm, 14 psi), close the high pressure hand valve.
c. Using a gas leak detector, check the system for leakage.
d. If leak is found, repair the faulty component or connection. e. Evacuate air from refrigeration system (See step 4).
CAUTION: Use the refrigerant recovery/recycling machine to recover the refrigerant whenever replacing parts.
3. CHARGE REFRIGERANT INTO REFRIGERANT SYSTEM
If there is no leak after refrigerant leak check, charge the proper amount of refrigerant into refrigeration system.
CAUTION:
^ Never run the engine when charging the system through the high pressure side.
^ Do not open the low pressure hand valve when the system is being charged with liquid refrigerant.
a. Open the high pressure hand valve fully.
b. Charge specified amount of refrigerant, then close the high pressure hand valve.
HINT: A fully charged system is indicated by the sight glass being free of any bubbles.
4. REMOVE MANIFOLD GAUGE SET
a. Close both hand valves of manifold gauge set.
b. Disconnect the quick disconnect adapters from the service valves.
5. INSTALL CAPS TO SERVICE VALVES ON REFRIGERANT LINES
1. INSTALL CHARGING CYLINDER
HINT: When handling the charging cylinder, always follow the directions given in the instruction manual.
a. Charge the proper amount of refrigerant into the charging cylinder.
b. Connect the center hose to the charging cylinder.
CAUTION: Do not open both high and low hand valves of manifold gauge set.
c. Open the valve of charging cylinder.
d. Press the valve core on the side of manifold gauge and expel the air inside of the center hose.
2. INSPECT REFRIGERATION SYSTEM FOR LEAKS
a. Open the high pressure hand valve and charge refrigerant.
b. When the low pressure gauge indicates 98 kPa (1 kgf/sq.cm, 14 psi), close the high pressure hand valve.
c. Using a gas leak detector, check the system for leakage.
d. If leak is found, repair the faulty component or connection. e. Evacuate air from refrigeration system (See step 4).
CAUTION: Use the refrigerant recovery/recycling machine to recover the refrigerant whenever replacing parts.
3. CHARGE REFRIGERANT INTO REFRIGERANT SYSTEM
If there is no leak after refrigerant leak check, charge the proper amount of refrigerant into refrigeration system.
CAUTION:
^ Never run the engine when charging the system through the high pressure side.
^ Do not open the low pressure hand valve when the system is being charged with liquid refrigerant.
a. Open the high pressure hand valve fully.
b. Charge specified amount of refrigerant, then close the high pressure hand valve.
HINT: A fully charged system is indicated by the sight glass being free of any bubbles.
4. REMOVE MANIFOLD GAUGE SET
a. Close both hand valves of manifold gauge set.
b. Disconnect the quick disconnect adapters from the service valves.
5. INSTALL CAPS TO SERVICE VALVES ON REFRIGERANT LINES
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.