ENGINE COOLANT REPLACEMENT
Required Special Tool
- MB991871: LLC changer
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- Remove the engine room under cover front A (Refer to «REMOVAL AND INSTALLATION»(ref-593044-S21660127572014011300000) . WARNING: When removing the radiator cap, use care to avoid contact with hot engine coolant or steam. Place a shop towel over the radiator cap and turn the radiator cap counterclockwise a little to let the pressure escape through the vinyl tube. After relieving the steam pressure, remove the radiator cap by slowly turning it counterclockwise.
- Drain the engine coolant from the radiator, heater core and engine after unplugging the radiator drain plug and removing the radiator cap.
- Disconnect the water hose < M/T > or cooling water line hose < CVT >, and drain the engine coolant in the water jacket.
- Drain the water in the water jacket by unplugging the drain plug of the cylinder block.
- Remove the radiator condenser tank and drain the engine coolant.
- Connect the water hose < M/T > or cooling water line hose < CVT >.
- Replace the cylinder block drain plug gasket, and tighten the drain plug to the specified torque. Tightening torque: 39 ± 3 N.m (29 ± 2 ft-lb)
- Securely tighten the radiator drain plug.
- Reinstall the radiator condenser tank. CAUTION: Do not use alcohol or methanol anti-freeze or any engine coolants mixed with alcohol or methanol anti-freeze. The use of an improper anti-freeze can cause corrosion of the aluminum components.
- Use special tool MB991871 to refill the engine coolant up to the top of the radiator port. Recommended antifreeze: DIA QUEEN SUPER LONG LIFE COOLANT PREMIUM or equivalent* *: similar high quality ethylene glycol based non-silicate, non-amine, non-nitrate and non-borate coolant with long life hybrid organic acid technology Quantity: 7.5 dm 3 (7.9 quarts) [includes 0.65 dm 3 (0.69 quarts) in the radiator condenser tank] NOTE: For how to use special tool MB991871, refer to the manufacturer's instructions.
- Tighten the radiator cap securely.
- Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
- Turn the A/C switch to OFF position to start the engine and warm up until the radiator fan operates. NOTE: This work is to open the thermostat fully.
- Rev the engine several times and then stop it. Check that there are no engine coolant leaks.
- Remove the radiator cap with the engine cool, and then refill the engine coolant up to the top of the radiator port.
- Tighten the radiator cap securely. CAUTION: Do not overfill the radiator condenser tank.
- Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
- Reinstall the engine room under cover front A (Refer to «REMOVAL AND INSTALLATION»(ref-593044-S21660127572014011300000) .
COOLING FAN RELAY REPLACEMENT
| CAUTION | Basically, remove or install the relay by hand. If the center of relay has been pinched by pliers, it can be damaged. |
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- Remove the relay by hand. If it cannot be removed by hand, pinch the part "A" (shown in illustration) with long-nose pliers and remove the relay.
- Install the new relay by hand.
>> A << THERMOSTAT INSTALLATION
| CAUTION | Avoid adhesion of grease to the rubber ring of the thermostat. If the rubber ring is damaged, replace the thermostat. |
Install the thermostat with care to avoid peeling or damage to the rubber ring. When installing the thermostat, face the jiggle valve of the thermostat upward.
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<< B >> ENGINE COOLANT TEMPERATURE SENSOR REMOVAL
Use special tool MB992042 to remove the engine coolant temperature sensor.
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>> A << O-RING INSTALLATION
| CAUTION | Avoid adhesion of engine oil or grease to the O-ring. |
Fit the O-ring in the water inlet pipe groove, wet the O-ring circumference or the pipe mounting area inner wall, and then insert the O-ring.
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- Apply the specified sealant to the thread of the engine coolant temperature sensor. Specified sealant: ThreeBond 1324N or equivalent NOTE: Install the engine coolant temperature sensor immediately after applying sealant. CAUTION: After the installation, until a sufficient period of time (one hour or more) elapses, do not apply the oil or water to the sealant application area or start the engine.
- Use special tool MB992042 to tighten the engine coolant temperature sensor to the specified torque. Tightening torque: 30 ± 9 N.m (22 ± 7 ft-lb)
<< A >> HOSE CLIP/RADIATOR UPPER HOSE/RADIATOR LOWER HOSE REMOVAL
- Make mating marks on the radiator hose and the hose clip (as shown in illustration) to install them in the original position.
- Break off the tip of hose clip claw and spread out the hose clip, then disconnect the radiator hose. NOTE: If there is a hose clip claw, the hose clip cannot spread to capacity because the claw contacts the hose clip.
<< B >> FAN, FAN MOTOR AND FAN SHROUD ASSEMBLY REMOVAL
Remove the fan, fan motor and fan shroud assembly from the radiator assembly according to the procedure below.
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- Release the upper locks of the radiator assembly from the fan, fan motor, and fan shroud assembly.
- Slightly raise the fan, fan motor, and fan shroud assembly.
- Release the lower locks of the radiator assembly from the fan, fan motor, and fan shroud assembly, and then remove the fan, fan motor and fan shroud assembly.