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 MANUALSMITSUBISHI2005LANCER L4-2.4L SOHCREPAIR AND DIAGNOSISMAINTENANCEDRIVE BELTTESTING AND INSPECTION
2005 Mitsubishi Lancer L4-2.4L SOHC
Drive Belt: Testing and Inspection
2005 Mitsubishi Lancer L4-2.4L SOHCSECTION Testing and Inspection
DRIVE BELT (FOR GENERATOR POWER STEERING OIL PUMP AND A/C COMPRESSOR) (CHECK CONDITION)
GENERATOR DRIVE BELT TENSION CHECK <2.0L ENGINE>
WHEN USING SCAN TOOL MB991958>
Required Special Tool:
^ MB991668: Belt Tension Meter Set
^ MB991958: Scan Tool (MUT-III Sub Assembly)
^ MB991824: V.C.I.
^ MB991911: MUT-III Main Harness B
CAUTION: To prevent damage to special tool MB991824, always turn the ignition switch to the LOCK (OFF) position before connecting or disconnecting special tool MB991824.
1. Connect special tool MB991668 to special tool MB991824.
2. Connect special tool MB991911 to special tool MB991824.
3. Connect special tool MB991911 to the data link connector.
4. Turn the ignition switch to the ON position and select Belt Tension from the menu special tool MB991824 screen.
5. Hold special tool MB991668 (microphone) near the center of the drive belt between the pulleys (at the place indicated by the arrow), about 10 - 20 mm (0.4 - 0.8 inch) away from the rear surface of the belt and perpendicular to the belt (within an angle of ± 15 degree angle).
CAUTION:
^ The temperature of the surface of the belt should be as close as possible to underhood temperature.
^ Do not let any contaminants such as water or oil get onto the microphone.
^ If strong gusts of wind blow against the microphone or if there are any loud sources of noise nearby, the values measured by the microphone may not correspond to actual values.
^ If the microphone is touching the belt while the measurement is being made, the values measured by the microphone may not correspond to actual values.
^ Do not take the measurement while the vehicle's engine is running.
6. Gently tap the middle of the belt between the pulleys (the place indicated by the arrow) with your finger as shown in the illustration, and check that the vibration frequency of the belt is within the standard value.
Standard value
Use a belt tension gauge to check that the belt tension is within the standard value.
Standard value
Apply approximately 100 N (22 pound) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection is within the standard value.
Standard value
GENERATOR DRIVE BELT TENSION ADJUSTMENT <2.0L ENGINE>
1. Loosen the nut of the generator pivot bolt.
2. Loosen the lock bolt.
3. Turn the adjusting bolt to adjust the belt vibration frequency, belt tension or deflection to the standard value.
CAUTION: Check after turning the crankshaft one or more rotations clockwise.
Standard value
4. Tighten the lock bolt.
Tightening torque: 23 ± 2 Nm (16 ± 2 ft. lbs.)
5. Tighten the nut of the generator pivot bolt.
Tightening torque: 44 ± 10 Nm (33 ± 7 ft. lbs.)
6. Tighten the adjusting bolt.
Tightening torque: 5.0 ± 1.0 Nm (44 ± 8 inch lbs.)
POWER STEERING OIL PUMP AND A/C COMPRESSOR DRIVE BELT TENSION CHECK AND ADJUSTMENT <2.0L ENGINE>
Check the drive belt tension by the following procedure.
Required Special Tool:
^ MB991958: Scan Tool (MUT-III Sub Assembly)
^ MB991824: V.C.I.
^ MB991911: MUT-III Main Harness B
^ MB991668: Belt Tension Meter Set
Gently tap the middle of the belt between the pulleys (the location indicated by the arrow) with your finger as shown in the illustration, and check that the vibration frequency of the belt is within the standard value.
NOTE: Refer to for details on the method of measuring the vibration frequency using the scan tool.
Use a belt tension gauge to check that the belt tension is within the standard value.
Apply approximately 100 N (22 pound) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection is within the standard value.
Standard value
If the tension or deflection is outside the standard value, adjust by the following procedure.
1. Loosen the tension pulley fixing nut A behind the tension pulley.
2. Adjust the belt deflection amount using the adjusting bolt B.
3. Tighten the fixing nut A.
Tightening torque: 26 ± 4 Nm (19 ± 3 ft. lbs.)
CAUTION: Check after turning the crankshaft one or more rotations clockwise.
4. Check the belt deflection amount and tension, and readjust if necessary.
DRIVE BELT TENSION CHECK <2.4L ENGINE>
CAUTION: Check the drive belt tension after turning the crankshaft clockwise one turn or more.
1. Make sure that the indicator mark is within the area marked with A in the illustration.
2. If the mark is out of the area, replace the drive belt.
NOTE: The drive belt tension adjustment is not necessary as auto-tensioner is adopted.
GENERATOR DRIVE BELT TENSION CHECK <2.0L ENGINE>
WHEN USING SCAN TOOL MB991958>
Required Special Tool:
^ MB991668: Belt Tension Meter Set
^ MB991958: Scan Tool (MUT-III Sub Assembly)
^ MB991824: V.C.I.
^ MB991911: MUT-III Main Harness B
CAUTION: To prevent damage to special tool MB991824, always turn the ignition switch to the LOCK (OFF) position before connecting or disconnecting special tool MB991824.
1. Connect special tool MB991668 to special tool MB991824.
2. Connect special tool MB991911 to special tool MB991824.
3. Connect special tool MB991911 to the data link connector.
4. Turn the ignition switch to the ON position and select Belt Tension from the menu special tool MB991824 screen.
5. Hold special tool MB991668 (microphone) near the center of the drive belt between the pulleys (at the place indicated by the arrow), about 10 - 20 mm (0.4 - 0.8 inch) away from the rear surface of the belt and perpendicular to the belt (within an angle of ± 15 degree angle).
CAUTION:
^ The temperature of the surface of the belt should be as close as possible to underhood temperature.
^ Do not let any contaminants such as water or oil get onto the microphone.
^ If strong gusts of wind blow against the microphone or if there are any loud sources of noise nearby, the values measured by the microphone may not correspond to actual values.
^ If the microphone is touching the belt while the measurement is being made, the values measured by the microphone may not correspond to actual values.
^ Do not take the measurement while the vehicle's engine is running.
6. Gently tap the middle of the belt between the pulleys (the place indicated by the arrow) with your finger as shown in the illustration, and check that the vibration frequency of the belt is within the standard value.
Standard value
Use a belt tension gauge to check that the belt tension is within the standard value.
Standard value
Apply approximately 100 N (22 pound) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection is within the standard value.
Standard value
GENERATOR DRIVE BELT TENSION ADJUSTMENT <2.0L ENGINE>
1. Loosen the nut of the generator pivot bolt.
2. Loosen the lock bolt.
3. Turn the adjusting bolt to adjust the belt vibration frequency, belt tension or deflection to the standard value.
CAUTION: Check after turning the crankshaft one or more rotations clockwise.
Standard value
4. Tighten the lock bolt.
Tightening torque: 23 ± 2 Nm (16 ± 2 ft. lbs.)
5. Tighten the nut of the generator pivot bolt.
Tightening torque: 44 ± 10 Nm (33 ± 7 ft. lbs.)
6. Tighten the adjusting bolt.
Tightening torque: 5.0 ± 1.0 Nm (44 ± 8 inch lbs.)
POWER STEERING OIL PUMP AND A/C COMPRESSOR DRIVE BELT TENSION CHECK AND ADJUSTMENT <2.0L ENGINE>
Check the drive belt tension by the following procedure.
Required Special Tool:
^ MB991958: Scan Tool (MUT-III Sub Assembly)
^ MB991824: V.C.I.
^ MB991911: MUT-III Main Harness B
^ MB991668: Belt Tension Meter Set
Gently tap the middle of the belt between the pulleys (the location indicated by the arrow) with your finger as shown in the illustration, and check that the vibration frequency of the belt is within the standard value.
NOTE: Refer to for details on the method of measuring the vibration frequency using the scan tool.
Use a belt tension gauge to check that the belt tension is within the standard value.
Apply approximately 100 N (22 pound) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection is within the standard value.
Standard value
If the tension or deflection is outside the standard value, adjust by the following procedure.
1. Loosen the tension pulley fixing nut A behind the tension pulley.
2. Adjust the belt deflection amount using the adjusting bolt B.
3. Tighten the fixing nut A.
Tightening torque: 26 ± 4 Nm (19 ± 3 ft. lbs.)
CAUTION: Check after turning the crankshaft one or more rotations clockwise.
4. Check the belt deflection amount and tension, and readjust if necessary.
DRIVE BELT TENSION CHECK <2.4L ENGINE>
CAUTION: Check the drive belt tension after turning the crankshaft clockwise one turn or more.
1. Make sure that the indicator mark is within the area marked with A in the illustration.
2. If the mark is out of the area, replace the drive belt.
NOTE: The drive belt tension adjustment is not necessary as auto-tensioner is adopted.
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.