Engine Cooling - Except Evolution: Removal & Installation Mitsubishi Lancer IX

ENGINE COOLANT REPLACEMENT

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1. Drain the water from the radiator, heater core and engine after unplugging the radiator drain plug and removing the radiator cap.
2. Drain the water in the water jacket by unplugging the drain plug of the cylinder block.
3. Remove the reserve tank and drain the coolant.
4. Drain the cooling water then clean the path of the cooling water by injecting water into the radiator from the radiator cap area.
5. Apply the designated sealant to the screw area of the cylinder block drain plug, and then tighten to the standard torque. Specified sealant: 3M™ Nut Locking Part number 4171 or equivalent Tightening torque: 44 +/- 5 N.m (33 +/- 3 ft-lb).
6. Securely tighten the drain plug of the radiator.
7. Assemble the reserve 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.
8. By referring to the section on coolant, select an appropriate concentration for safe operating temperature within the range of 30 to 60 %. Use special tool MB991871 to refill the coolant. A convenient mixture is a 50 % water and 50 % antifreeze solution [freezing point: -31°C (-32.8°F)]. Recommended antifreeze: MITSUBISHI GENUINE Part number MD970389 or equivalent Quantity: 5.0 dm 3 (5.3 quarts) NOTE: For how to use special tool MB991871, refer to its manufacturer's instructions.
9. Reinstall the radiator cap.
10. Start the engine and let it warm up until the thermostat opens.
11. After repeatedly revving the engine up to 3,000 r/min several times, then stop the engine.
12. Remove the radiator cap after the engine has become cold, and pour in coolant up to the brim. Reinstall the cap. CAUTION: Do not overfill the reserve tank.
13. Add coolant to the reserve tank between the "FULL" and "LOW" mark if necessary.

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1. Remove the fan controller connector.
2. Turn the ignition switch to the ON position, and measure the voltage between the harness-side connector terminals. Standard value: Battery positive voltage
3. Connect the fan controller connector, and disconnect the condenser fan motor connector.
4. Ensure that the A/C switch is off, and start the engine and run it at idle.
5. Measure the voltage between the fan controller-side connector terminals. Standard value: 1V or less
6. Turn the A/C switch to the ON position. WARNING: Stay clear of the fan when the fan starts running.
7. Measure the voltage between the fan controller-side connector terminals while the fan is running. The voltage should repeat the values 1) and 2) below. Standard value: 8.2 +/- 2.6 V Battery positive voltage +/- 2.6 V
8. If the voltage does not repeatedly change as indicated, replace the fan controller.

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>> A << THERMOSTAT INSTALLATION

Install the thermostat so that the jiggle valve is facing straight up. Be careful not to fold or scratch the rubber ring.

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1. Insert each hose as far as the projection of the water inlet fitting.
2. Align the mating marks on the radiator hose and hose clamp, and then connect the radiator hose.

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1. Immerse the thermostat in water, and heat the water while stirring. Check the thermostat valve opening temperature. Standard value: Valve opening temperature: 82 +/- 1.5°C (180 +/- 3°F)
2. Check that the amount of valve lift is at the standard value when the water is at the full-opening temperature. NOTE: Measure the valve height when the thermostat is fully closed, and use this measurement to compare the valve height when the thermostat is fully open. Standard value: Full-opening temperature: 95°C (203°F) Amount of valve lift: 8.5 mm (0.33 inch)

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1. Use a gasket scraper or wire brush to completely eliminate all gasket material on the gasket mounting surface.
2. Apply a bead of the specified sealant. Specified Sealant: MITSUBISHI GENUINE PART MD970389 or equivalent
3. With the sealant still wet (within 15 minutes after the sealant is applied), install the water pump. Do not apply the sealant in an area more than the required.

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>> A << WATER OUTLET FITTING/THERMOSTAT CASE ASSEMBLY INSTALLATION

1. Use a gasket scraper or wire brush to completely eliminate all gasket material on the gasket mounting surface.
2. Apply a bead of the specified sealant. Specified Sealant: MITSUBISHI GENUINE PART MD970389 or equivalent
3. With the sealant still wet (within 15 minutes after the sealant is applied), install the thermostat case and water outlet fitting. Do not apply the sealant in an area more than the required.

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1. Insert each hose as far as the projection of the water outlet fitting.
2. Align the mating marks on the radiator hose and hose clamp, and then connect the radiator hose.

>> C << O-RING INSTALLATION

Insert the O-ring to the water pipe, and coat the outer portion of the O-ring with water or engine coolant.

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