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 DIAGNOSISMAINTENANCEFLUIDSCOOLANTSERVICE AND REPAIR
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)
Coolant: Service and Repair
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)SECTION Service and Repair
REPLACEMENT
1. DRAIN COOLANT
CAUTION: To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator are still hot, as fluid and steam can be blown out under pressure.
a. Remove the radiator cap.
b. Loosen the radiator plug and drain the coolant.
2. ADD COOLANT
a. Tighten the radiator drain plug, and pour coolant into radiator until it overflows.
HINT:
^ Press the radiator inlet and outlet hose several times with hard.
^ If the coolant level gets lower, pour coolant.
b. Tighten the radiator cap.
c. Pour engine coolant into the reservoir tank until it reaches full line.
d. Warm up the engine until the thermostat valve begins to open.
HINT: Press the radiator inlet and outlet hose several times with hard during the warming up.
e. Stop the engine and wait until the coolant temperature gets cold. Then remove the radiator cap to check the coolant level.
f. If the level gets lower, perform the procedures again.
g. If the level does not gets lower, adjust the reservoir tank coolant level.
3. INSPECT COOLANT LEAKS
a. Fill the radiator with coolant and attach a radiator cap tester.
b. Pump it to 118 kPa (1.2 kgf/cm2), and check leakage.
1. DRAIN COOLANT
CAUTION: To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator are still hot, as fluid and steam can be blown out under pressure.
a. Remove the radiator cap.
b. Loosen the radiator plug and drain the coolant.
2. ADD COOLANT
a. Tighten the radiator drain plug, and pour coolant into radiator until it overflows.
HINT:
^ Press the radiator inlet and outlet hose several times with hard.
^ If the coolant level gets lower, pour coolant.
b. Tighten the radiator cap.
c. Pour engine coolant into the reservoir tank until it reaches full line.
d. Warm up the engine until the thermostat valve begins to open.
HINT: Press the radiator inlet and outlet hose several times with hard during the warming up.
e. Stop the engine and wait until the coolant temperature gets cold. Then remove the radiator cap to check the coolant level.
f. If the level gets lower, perform the procedures again.
g. If the level does not gets lower, adjust the reservoir tank coolant level.
3. INSPECT COOLANT LEAKS
a. Fill the radiator with coolant and attach a radiator cap tester.
b. Pump it to 118 kPa (1.2 kgf/cm2), and check leakage.
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.