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6D2–4 IGNITION SYSTEM (6VD1 3.2L) Spark Plug Removal 1. Remove spark plugs. Inspection and Repair The spark plug affects entire engine performance and D Check electrode and insulator for presence of cracks, D Check electrode for wear, and replace if necessary. D Check gasket for damage, and replace if necessary. D Measure insulation resistance with an ohmmeter, and D Adjust spark plug gap to 1.0 mm (0.04 in) ∼ 1.1 mm (0.043 in). D Check fuel and electrical systems if spark plug is D Use spark plugs having low heat value (hot type plug) D Use spark plugs having high heat value (cold type Sooty Spark Plugs Much deposit of carbon or oil on the electrode and Possible causes: D Too rich mixture D Presence of oil in combustion chamber D Incorrectly adjusted spark plug gap Burning Electrodes This fault is characterized by scorched or heavily oxidized Possible causes: D Too lean mixture D Improper heat value Measuring Insulation Resistance D Measure insulation resistance using a 500 volt D Replace spark plugs if measured value is out of Insulation resistance: 50 M W or more 011RS010 Cleaning Spark Plugs D Clean spark plugs with a spark plug cleaner. D Raise the ground electrode to an angle of 45 to 60 D After spark plug is thoroughly cleaned, check D Clean threads and metal body with a wire brush. D File the electrode tip if electrode is extremely worn. D Bend the ground electrode to adjust the spark plug 011RS011 Installation 1. Spark plugs D Tighten spark plugs to the specified torque. Torque: 18 N·m (1.8 kg·m/13 lb ft) |