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 MANUALSBUICK1996CENTURY SEDAN L4-2.2L VIN 4REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIR
1996 Buick Century Sedan L4-2.2L VIN 4
Spark Plug: Service and Repair
1996 Buick Century Sedan L4-2.2L VIN 4SECTION Service and Repair
TOOL REQUIRED
J 39358 Spark Plug Socket Wrench or equivalent.
REMOVE OR DISCONNECT
NOTICE:
Pull on spark plug boot or heat shield only, twisting a half turn to release seal while removing. Do not pull on wire or spark plug lead may be damaged.
1. Spark plug lead from spark plug.
2. Spark plug using J 39358.
INSTALL OR CONNECT
NOTICE:
Be sure plug threads smoothly into cylinder head and is fully seated. Cross-threading or failing to fully seat spark plug can cause overheating of plug, exhaust blow-by , or thread damage. Follow recommended torque specifications carefully. Over or under-tightening can also cause severe damage to engine or spark plug.
1. Spark plug using J 39358.
- Be sure spark plug is properly gapped to 1.50 mm (0.060 in).
Tighten
Spark plug(s) to 20 Nm (15 lb. ft.)
2. Spark plug lead to spark plug.
J 39358 Spark Plug Socket Wrench or equivalent.
REMOVE OR DISCONNECT
NOTICE:
Pull on spark plug boot or heat shield only, twisting a half turn to release seal while removing. Do not pull on wire or spark plug lead may be damaged.
1. Spark plug lead from spark plug.
2. Spark plug using J 39358.
INSTALL OR CONNECT
NOTICE:
Be sure plug threads smoothly into cylinder head and is fully seated. Cross-threading or failing to fully seat spark plug can cause overheating of plug, exhaust blow-by , or thread damage. Follow recommended torque specifications carefully. Over or under-tightening can also cause severe damage to engine or spark plug.
1. Spark plug using J 39358.
- Be sure spark plug is properly gapped to 1.50 mm (0.060 in).
Tighten
Spark plug(s) to 20 Nm (15 lb. ft.)
2. Spark plug lead to spark plug.
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.