Specifications: Other Toyota 4Runner III

COOLING SYSTEM BLEEDING

Note. Whenever cooling system is drained on 2000 Celica and MR2, special cooling system bleeding procedure needs to be followed. No special procedure is required for any other models.

CELICA (2000)

Note. The following procedure assumes that cooling system has been completely drained by loosening radiator drain plug on bottom of radiator, and engine drain plug on the coolant drain union located on left rear of cylinder block.

1. Remove upper front fender apron cover and upper radiator support cover to access radiator coolant reservoir tank and hoses. Loosen 2 coolant reservoir bolts and 3 reservoir hose retaining clamps. Raise coolant reservoir and place on top of air cleaner cover. Support reservoir from above with wire to prevent reservoir from falling.
2. Remove cooling system bleed plug. Ensure radiator drain plug and engine drain plug on coolant drain union are closed. Add approximately 4 qts. (3.7L) of 50/50 mix of water (preferably distilled water) and coolant to reservoir tank. DO NOT use plain water or alcohol base coolant. Continue to add water/coolant mixture as necessary. If cooling system does not require approximate refill capacity to maintain coolant in reservoir at the FULL mark, air exists in system or system was not properly drained. See «4-CYLINDER COOLING SYSTEM SPECIFICATIONS»(ref-8771-S30497900842000092100000) table.
3. If cooling system will not take additional coolant, squeeze lower radiator hose while blocking off bleed plug opening with finger. Continue to do this while slowly adding coolant. Start engine with reservoir cap and bleed plug removed. Ensure A/C switch is in OFF position, if equipped. Run engine until cooling fan comes on and goes off one time. Add additional coolant to reservoir as necessary.
4. Install bleed plug and reservoir cap. Rotate reservoir cap 2 1/2 turns until click is heard. Increase engine speed to 3000 RPM for 5 seconds, and then allow to idle for 5 seconds. Repeat this procedure for at least 15 minutes. Turn off engine and allow engine to cool completely. With engine completely cooled, coolant level in reservoir should be between LOW and FULL marks. Next time engine warms to normal operating temperature, coolant reservoir level should be above the FULL mark.
5. Reinstall engine coolant reservoir. Reinstall covers. Check for coolant leaks.

MR2

Note. Following procedure assumes engine has been properly drained and cooling system is empty. Ensure drain plugs in radiator, radiator pipes and engine are tight.

Scheme 1

Scheme 2

1. Connect service hoses to air drain plug of radiator and heater water valve. Suspend opposite ends to hood. (Scheme 1) Turn air drain plug of radiator and heater water valve counterclockwise to open.
2. Slowly add engine coolant. DO NOT use alcohol type coolant or plain water. Distilled water is preferred. Check that air is bleeding from air drain service hose of radiator and heater water valve. When filling coolant reservoir, keep level at upper two thirds of reservoir. Ensure water level of air drain hoses is equal to that of coolant reservoir. (Scheme 2)
3. Turn air drain plugs of radiator and heater water valve clockwise to close. Install reservoir cap. Remove service hoses. Start engine and check that air is bleeding to reservoir. After warming up engine sufficiently and cooling fans come on at least once, coolant level should be over FULL mark. See «4-CYLINDER COOLING SYSTEM SPECIFICATIONS»(ref-8771-S30497900842000092100000). After complete cooling of engine, coolant level should be between LOW and FULL. If not, repeat step 1) and 2).
4. Reinstall tool box and luggage compartment trim box cover. Reinstall luggage under cover.