Spark Plug Installation Recommendations
Spark Plug Gap
Automotive:
E3 Spark Plugs for automotive applications have a unique three-leg ground electrode that is pre-gapped at our factory to meet the O.E. requirements for the vehicles they are listed to fit. No further gapping is required.
Lawn & Garden and PowerSport
E3 Lawn & Garden and PowerSport plugs are gapped at the factory, but may require some adjustment to meet your O.E. engine requirements.
Applying the Correct Torque:
When torquing a new spark plug, ALWAYS follow the instructions listed below or in the manufacturer's literature. Improper torquing can lead to engine damage!
- The first step required for proper torquing of the plug is clean thread surfaces. Clean threads will ensure a tight seal and maximum performance.
- If anti-seize compound is to be used, it should be applied sparingly as this could foul the plug, produce excessive carbon build-up on the threads, as well as give off fumes once the engine gets to operating temperature.
- The torque requirements vary greatly from engine to engine. Care must be taken when torquing spark plugs, especially in softer aluminum engines.
- The proper torque of a spark plug is easiest to achieve with a torque wrench. In the absence of this tool, the table below also provides a guide to torquing based on the number of turns after the plug becomes finger-tight.
- The table below lists the torquing specifications for most spark plugs in both cast iron and aluminum cylinder heads.
- Torque values assume clean, dry threads. The use of anti-seize or thread lubricants will modify these values unpredictably
EXAMPLE (without a torque wrench):
A tapered-seat spark plug would be tightened by 1/16th of a turn past finger tight, as shown in the illustration:
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