1993 Honda Civic Owner's Manual - Page 127
1993 Honda Civic Manual
Page 127 highlights
Spark Plugs NOTICE Tighten the spark plugs carefully. A spark plug that is too loose can overheat and damage the engine. Overtightening can cause damage to the threads in the cylinder head. 7. Install the spark plug cap. 8. Repeat this procedure for the other three spark plugs. 4. Set the gap on the new spark plug with a wire-type spark plug gapping tool. Do not use a blade-type feeler gauge. Plug gap should be: 0.04 in (1.1 mm). 5. Put the new spark plug into the socket, then thread it into the hole. Screw it in by hand so you do not crossthread it. 6. Torque the spark plug. (If you do not have a torque wrench, tighten the spark plug one-quarter turn after it contacts the cylinder head.) Tightening torque: 13 Ib-ft (18 Nm, 1.8 kg-m). continued Maintenance
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