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 L4-2.0L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIR
2005 Mitsubishi Lancer L4-2.0L SOHC
Spark Plug: Service and Repair
2005 Mitsubishi Lancer L4-2.0L SOHCSECTION Service and Repair
SPARK PLUGS (REPLACE)
CAUTION: Iridium plugs are used on 2.4L engine. Use care not to damage the iridium tips of the iridium plugs. Do not attempt to adjust the gap on these plugs.
1. Spark plugs must spark properly to assure proper engine performance and reduce exhaust emission level.
Therefore, they should be replaced periodically with new ones.
Spark plug type
2. The new plugs should be checked for the proper gap.
Spark plug gap:
<2.0L Engine> 1.0 - 1.1 mm (0.039 - 0.043 inch)
<2.4L Engine> 0.7 - 0.8 mm (0.028 - 0.031 inch)
3. Install the spark plugs and tighten to 25 ± 4 Nm (18 ± 3 ft. lbs.)
CAUTION: Iridium plugs are used on 2.4L engine. Use care not to damage the iridium tips of the iridium plugs. Do not attempt to adjust the gap on these plugs.
1. Spark plugs must spark properly to assure proper engine performance and reduce exhaust emission level.
Therefore, they should be replaced periodically with new ones.
Spark plug type
2. The new plugs should be checked for the proper gap.
Spark plug gap:
<2.0L Engine> 1.0 - 1.1 mm (0.039 - 0.043 inch)
<2.4L Engine> 0.7 - 0.8 mm (0.028 - 0.031 inch)
3. Install the spark plugs and tighten to 25 ± 4 Nm (18 ± 3 ft. lbs.)
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.