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 MANUALSTOYOTA2002HIGHLANDER 4WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISMAINTENANCEFLUIDSCOOLANTTESTING AND INSPECTION
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)
Coolant: Testing and Inspection
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)SECTION Testing and Inspection
INSPECTION
HINT: Check the coolant level when the engine is cold.
1. CHECK ENGINE COOLANT LEVEL AT RESERVOIR
The engine coolant level should be between the "LOW" and "FULL" line. If low, check for leaks and add "Toyota Long Life Coolant" or equivalent up to the "FULL" line.
2. CHECK ENGINE COOLANT QUALITY
a. Remove the radiator cap.
CAUTION: To avoid the danger of being burned, do not remove the radiator the cap while the engine and radiator are still hot, as fluid and steam can be blown out under pressure.
b. There should not be any excessive deposits of rust or scale around the radiator cap or radiator filler hole, and the coolant should be free from oil.
If excessively dirty, replace the coolant.
c. Reinstall the radiator cap.
HINT: Check the coolant level when the engine is cold.
1. CHECK ENGINE COOLANT LEVEL AT RESERVOIR
The engine coolant level should be between the "LOW" and "FULL" line. If low, check for leaks and add "Toyota Long Life Coolant" or equivalent up to the "FULL" line.
2. CHECK ENGINE COOLANT QUALITY
a. Remove the radiator cap.
CAUTION: To avoid the danger of being burned, do not remove the radiator the cap while the engine and radiator are still hot, as fluid and steam can be blown out under pressure.
b. There should not be any excessive deposits of rust or scale around the radiator cap or radiator filler hole, and the coolant should be free from oil.
If excessively dirty, replace the coolant.
c. Reinstall the radiator cap.
RENDER: 1.0x
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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.