How to Select and Service Spark Plugs
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After the appropriate washer is installed on the spark plug (you mighthave to try several different washers on each plug), simply tighten theplug in the cylinder head. Given the varying washer thickness and thesoft nature of the copper gasket, you can adjust the index mark on yourspark plug so the electrode is correctly situated in the cylinder.Here's a tip: In most Corvette cases, the engine responds to a gap thatfaces the center of the cylinder or angled slightly toward the exhaustvalve. On the other hand, some combinations prefer different electrodepositions. View Related Article
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