Camaro V8-6.2L (2010)
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Measure the gap between the centre electrode (4) and the side electrode (3) terminals. Refer to Ignition System Specifications (See: Ignition
System/Specifications).
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Inspect for the correct spark plug torque. Refer to Ignition System Specifications (See: Ignition System/Specifications). Insufficient torque
can prevent correct spark plug operation. An over-torqued spark plug causes the insulator (2) to crack.
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Inspect for signs of tracking that occurred near the insulator tip instead of at the centre electrode (4).
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Inspect for a side electrode (3) that is broken or worn.
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Inspect for a broken, worn, or loose centre electrode (4) by shaking the spark plug.
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A rattling sound indicates internal damage.
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A loose centre electrode (4) reduces the spark intensity.
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Inspect for bridged electrodes (3 and 4). Deposits on the electrodes reduce or eliminate the gap.
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Inspect for worn or missing platinum pads on the electrodes (3 and 4), if equipped.
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Inspect for excessive fouling.
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Inspect the spark plug recess area of the cylinder head for debris. Dirty or damaged threads can cause the spark plug not to seat correctly during
installation.
Spark Plug Visual Inspection
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Normal operation. Brown to grayish-tan spark plugs, with small amounts of white powdery deposits are normal combustion by-products from fuels
with additives.
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Carbon-fouled plugs. Dry, fluffy black carbon or soot caused by the following conditions:
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Rich fuel mixtures
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Leaking fuel injectors
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Excessive fuel pressure
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Restricted air filter element
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Incorrect combustion
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Reduced ignition system voltage output
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Weak coils
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Worn ignition wires
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Incorrect spark plug gap
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Excessive idling or slow speeds during light loads can keep the spark plug temperatures so low that the normal combustion deposits may not
burn off.
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Deposit fouling. Oil, coolant, or additives that include substances such as silicone, evidenced by a very white coating, reduces the spark intensity.
Most powdery deposits will not affect spark intensity unless they form into a glazing over the electrode.
